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, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

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, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen

We will assist in every way possible, the adjustment of such claims.

There is also a large drawer located in the base for keeping the testing pans, ther- mometer and other accessories. 1085 30 1087 SEPARATORY FUNNEL, with stopcock, capacity, 120 c.c 3.00 1088 COPPER STILL, with steel clamps, inside dimensions, 6x3^ inches, with six paper gaskets 15.25 1088a COPPER STILL, Same as No. e., inside dimen- sions, 7^x5 inches 19.50 1089 RING BURNER, brass, to fit small Still No. 1099c 1099b 1098 1099cl 1098 EXTRACTION APPARATUS, Barrett modification of the Cottle, or Underwriters' form. Made to special dimensions and with neck set at special angle, otherwise similar to regular retorts which, however, are not suited for this work 1.45 SPECIAL APPARATUS REQUIRED FOR ADDITIONAL CREOSOTE OIL TESTS 1099d SEPARATORY FUNNEL, with ground glass stopper and stopcock, grad- uated to 100 c.c.; for heavy oils .50 BAKING OVENS. 1105 Becker Balance equipped with chain, and gives direct rapid reading without rider or small weights. Short 7-inch cold rolled aluminum beam with 50 divisions on each side.

ADVANTAGES 1st, produces uniform penetration tests; 2nd, controls the duration of tests; 3rd, applies uniformity of penetration weights; 4th, eliminates vibra- tion during operation; 5th, insures absence of personal equation. 1088 1.90 1089a RING BURNER, brass, to fit large Still No. Complete with flask, cover, coil and basket of Ger- man silver wire ." , .25 1098a GLASS FLASKS, only, for above Extraction Apparatus 60 1098b WIRE BASKET, of German silver, only for above Extraction Apparatus. .80 1098c COVER AND COIL, of block tin, only, for above Extraction Apparatus 3.00 SPECIAL APPARATUS REQUIRED FOR STANDARD CREOSOTE OIL DISTILLATION 1099 ASBESTOS SHEET, specially cut to fold into cover for retort [[

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

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, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

]].50 1099a THERMOMETER, graduated from to 400 C. Made specially for this test 5.00 1099b CONDENSER TUBE \'...'. For Baking Ovens, see the Despatch Electric Oven LABORATORY SUPPLIES AND CHEMICALS 15 CHAINOMATIC BALANCES ANALYTICAL CHAINOMATIC BALANCE NO. Polished mahogany case, front sliding frame, counterpoised. After all the necessary large weights up to 50 milligrams are placed on the pan, the weighing from 50 milligrams to 1/10 of a milligram can be concluded without opening the balance or using the arrest, eliminating the necessity of reading and re- placing all small weights or the handling of a rider with a consequent enormous saving of time. We are also in position to furnish a less expensive Chainomatic Balance of follow- ing specifications: No. 1105 Becker Balance equipped wtih chain, and gives direct rapid reading without rider or small weights. 1105 Capacity 100 grams Sensitiveness , 1/20 milligram Diameter of pans 3 inches Length of beam 6 inches Bearings ;..... Polished mahogany and glass case, glass top, front sliding frame counterpoised.

We are prepared to furnish any apparatus both in Metalware and Glassware required on special tests, etc. 1062 1064 ASBESTOS PAPER, useful in filtering acids, etc., in rolls 36 inches wide any length, one yard, weighing about 1 Ib. The depth of penetration is read directly from the dial, each division of which corresponds to 0.1 mm. FOR SPECIAL TESTS the instrument may be adjusted for any variation desired. The heat is gen- erated from a ten-inch rmg burner below the oven, the outside is covered with asbestos, made of Russian iron .00 1079a DRYING OVEN. 1079, but made of copper 35.00 1080 BITUMEN HOLDER. 3.00 1080 1081 1081 DULIN ROTAREX, de- signed for the determination of Mineral Aggregate in Bituminous pavements. APPARATUS FOR TESTING COAL TAR AND REFINED TARS, OILS AND PITCHES DERIVED THEREFROM As adopted in the Standard Methods of the Barrett Manufacturing Company, New York. An American made Balance of high reputation, in widespread use. Dimensions, 16J4 inches long, 9 inches wide, 18^ inches high. Price, as above described 5.00 Price, with adjustable shelf for supporting beaker when taking specific gravities.

LABORATORY SUPPLIES AND CHEMICALS 1014 1022 1028 1034 1014 ALKALIMETER Bunsen's . 1050 1040 1042 1040 ANVIL, for Lead Buttons, 6"x6", planed on one side

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

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, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

.20 1042 ANVIL, Plattner's, l^"xl^", for blowpipe work, polished steel. Z A l /2 Weight, about, Ibs 2J4 4^ 6^ 9 13 J4 17^ ^A 35 Per Ib [[

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

]].85 1056 ASBESTOS BOARDS, cut in squares. Useful as a wrapping for han- dles of apparatus which become heated, and to suspend retorts, crucibles, etc. Per Ib [[

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

]].40 1065 ASBESTOS WOOD, so-called Asbestos Lumber, harder than wood, acid and fireproof, in sheets 42x48 inches. ASPHALT TESTING APPARATUS 1066 1066 CEMENTATION MACHINE, Kirschbraun's. Either the 50, 100, 150, 200, 250, 300 or 350 gram test may be made with equal accuracy and speed by a simple substitution of weights. A complete extraction can be made in five minutes, which would require two hours by the filtering methods. 5.00 APPARATUS FOR WATER SAMPLING IN CREOSOTE OILS. This apparatus consists of a brass cylinder with a pointed, perforated bottom. See Journal of Industrial and Engineering Chemistry, April, 1911, March, 1913, and May, 1914. With specific grav- ity support and holder for weighing test tubes, with coun- terpoise. Release and Arrest Independent arrest for pans with automatic stop.

.50 [[

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

]].80 [[

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

]].80

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

.20

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

.20

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib .60 .60 .60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each [[

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

]].75

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

.25 .25 A. Thickness, inches J^ J4 -Hs Per square foot [[

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

]].40 [[

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

]].80

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

||

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. .00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard .25 .50 .00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each

, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background. Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue. We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information. Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements. Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

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, $1.75 1022 ALKALIMETER Geissler's, latest form, with tv/o ground joints 3.00 1028 ALKALIMETER Mohr's (latest style) 2.50 1034 ALKALIMETER Schroedter's . .50 1050 APRON, of waterproof rubber cloth, to protect the clothes from chemicals. 1054 ASBESTOS SHEETS, 42x48 inches, fire and acid-proof. Size, inches 4x4x3*2 4x4xi 3 ff 5x5x3*2 Sx Sx'r V 6x6xg"2 6x6x1*3 Dozen $0.50 $0.80 $0.80 $1.20 $1.20 $1.80 1057 ASBESTOS CLOTH, 36 inches wide, unaffected by acid, fire, etc. Diameter, inches 1 A 1 A ^ Per Ib $3.60 $3.60 $3.60 1062 ASBESTOS PADS, for protecting table under blast lamps, etc. Size, inches 8x8 10x13 13x20 Each $0.75 $1.25 $2.25 A. Thickness, inches J^ J4 -Hs Per square foot $0.40 $0.80 $1.25 The above prices are for full sheets 42x48 inches. For testing the cementa- tion values of asphalt cements. The needle may be readily clamped or released for special tests by means of a clutch. With a specially constructed elec- tric motor, which can be operated on either alternat- ing or direct current, 110 volts (unless 25 cycles or less), including 5 feet of lamp cord with plug for attaching to Edison lamp socket. $70.00 (Descriptive circular upon application.) LABORATORY SUPPLIES AND CHEMICALS 11 1083 DULIN ROTAREX, as above, large size, with universal motor, capable of operating on either direct or alternating current. 1084 SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR MAKING WATER DETERMINATIONS "It is recommended as good practice that, in order to obtain accurate determinations as to the percentage of water contained in creosote oil in tank cars and in storage tanks, the principle of zone sampling be employed, and described in the 1916 report of your Committee (Proceedings, Vol. 447 to 456) and that for the purpose of obtaining zone samples an apparatus of the type illustrated in this report be used." From Bulletin of the American Railway Engineering Association, Vol. The holes in the bottom are closed by means of a spring valve, which can be opened by means of a wire extending along the extended stem attached to the cylinder. The apparatus listed below is only the special apparatus re- quired for these tests. Beam Graduated on both sides in 1-10 milligram, with white gradu- ations on black background.

Length 45, 48 or 50 inches, as desired 1.00 See also Sleeves and Gloves. Fine Medium Heavy Per yard $4.25 $5.50 $7.00 1058 ASBESTOS CEMENT, fire and acid-proof, for repairing furnaces, etc. If smaller sheets are desired, an extra charge for cutting and waste will be made. Furnished with hand power or with pulley for motor power. For periods of penetration other than five seconds, the push button on the right may be used and any desired time may be allowed for penetration, the period being controlled by the large minute dial at the top of the instrument. Description: The needle for this test shall be of cylindrical steel rod, 50.8 mm. (.04 inch) and turned on one end to a sharp point, having a taper of 6.35 mm. Price, each $1.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price $123.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

.00 LABORATORY SUPPLIES AND CHEMICALS 1073 1073 ASPHALT FLOW PLATE. 110 volts, 60 cycles or on 220 volts direct current. This stem is made in several sections, so that it can be used at any depth. The regular apparatus, such as tripods, burners, clamps, etc., are to be found under their respective headings throughout the catalogue.

We have made an attempt to simplify the work of ordering our merchandise, wherever it has been possible to do so, without sacrificing accuracy or necessary information.

Each illustration shows either a standard type of apparatus or a characteristic feature which may be adapted to your requirements.

Fluctuations may be expected, but our prices will be consistent with existing conditions over which we have no control. All shipments are made in compliance with Interstate Commerce Commission regulations. 1119 1119 BALANCE Analytical School Laboratory Balance. the needs of Chemistry, Agriculture and Physics Laboratories requiring a well-built, high-grade balance of precision. Aluminum pans with nickel silver hang- ers, black glass plate.

The cost of containers and packing will be charged at cost. Parcel-post shipments will be made wherever possible, with a small charge for insurance. Designed and made by an expert with over twenty years' actual experience in analytical balance making. Guarantee May be returned at our expense if after a fair trial it does not prove satisfactory. Price 3.50 1125 1125 BALANCE PORTABLE ASSAY Troemner's.

UC-NRLF B 3 057 775 io=/t25th YEd R EDITION 1919 CHEMICALS CHEMICAL BACTERIOLOGICAL SUPPLIES GIFT OF _ , 18941919 TWENTY- FIFTH YEAR EDITION Laboratory Supplies and Chemicals for Chemists and Bacteriologists A. Long Distance Telephones : Cable Address 6031 "CELERITAS' 6032 CENTRAL 6033 A. No attempt has been made to prepare a complete list of scientific laboratory apparatus and equipment as there are many highly specialized forms of equipment to which only occasional reference is necessary.

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We will assist in every way possible, the adjustment of such claims.

There is also a large drawer located in the base for keeping the testing pans, ther- mometer and other accessories. 1085 30 1087 SEPARATORY FUNNEL, with stopcock, capacity, 120 c.c 3.00 1088 COPPER STILL, with steel clamps, inside dimensions, 6x3^ inches, with six paper gaskets 15.25 1088a COPPER STILL, Same as No. e., inside dimen- sions, 7^x5 inches 19.50 1089 RING BURNER, brass, to fit small Still No. 1099c 1099b 1098 1099cl 1098 EXTRACTION APPARATUS, Barrett modification of the Cottle, or Underwriters' form. Made to special dimensions and with neck set at special angle, otherwise similar to regular retorts which, however, are not suited for this work 1.45 SPECIAL APPARATUS REQUIRED FOR ADDITIONAL CREOSOTE OIL TESTS 1099d SEPARATORY FUNNEL, with ground glass stopper and stopcock, grad- uated to 100 c.c.; for heavy oils $2.50 BAKING OVENS. 1105 Becker Balance equipped with chain, and gives direct rapid reading without rider or small weights. Short 7-inch cold rolled aluminum beam with 50 divisions on each side.

ADVANTAGES 1st, produces uniform penetration tests; 2nd, controls the duration of tests; 3rd, applies uniformity of penetration weights; 4th, eliminates vibra- tion during operation; 5th, insures absence of personal equation. 1088 1.90 1089a RING BURNER, brass, to fit large Still No. Complete with flask, cover, coil and basket of Ger- man silver wire ." , $4.25 1098a GLASS FLASKS, only, for above Extraction Apparatus 60 1098b WIRE BASKET, of German silver, only for above Extraction Apparatus. .80 1098c COVER AND COIL, of block tin, only, for above Extraction Apparatus 3.00 SPECIAL APPARATUS REQUIRED FOR STANDARD CREOSOTE OIL DISTILLATION 1099 ASBESTOS SHEET, specially cut to fold into cover for retort $0.50 1099a THERMOMETER, graduated from to 400 C. Made specially for this test 5.00 1099b CONDENSER TUBE \'...'. For Baking Ovens, see the Despatch Electric Oven LABORATORY SUPPLIES AND CHEMICALS 15 CHAINOMATIC BALANCES ANALYTICAL CHAINOMATIC BALANCE NO. Polished mahogany case, front sliding frame, counterpoised. After all the necessary large weights up to 50 milligrams are placed on the pan, the weighing from 50 milligrams to 1/10 of a milligram can be concluded without opening the balance or using the arrest, eliminating the necessity of reading and re- placing all small weights or the handling of a rider with a consequent enormous saving of time. We are also in position to furnish a less expensive Chainomatic Balance of follow- ing specifications: No. 1105 Becker Balance equipped wtih chain, and gives direct rapid reading without rider or small weights. 1105 Capacity 100 grams Sensitiveness , 1/20 milligram Diameter of pans 3 inches Length of beam 6 inches Bearings ;..... Polished mahogany and glass case, glass top, front sliding frame counterpoised.

We are prepared to furnish any apparatus both in Metalware and Glassware required on special tests, etc. 1062 1064 ASBESTOS PAPER, useful in filtering acids, etc., in rolls 36 inches wide any length, one yard, weighing about 1 Ib. The depth of penetration is read directly from the dial, each division of which corresponds to 0.1 mm. FOR SPECIAL TESTS the instrument may be adjusted for any variation desired. The heat is gen- erated from a ten-inch rmg burner below the oven, the outside is covered with asbestos, made of Russian iron $25.00 1079a DRYING OVEN. 1079, but made of copper 35.00 1080 BITUMEN HOLDER. 3.00 1080 1081 1081 DULIN ROTAREX, de- signed for the determination of Mineral Aggregate in Bituminous pavements. APPARATUS FOR TESTING COAL TAR AND REFINED TARS, OILS AND PITCHES DERIVED THEREFROM As adopted in the Standard Methods of the Barrett Manufacturing Company, New York. An American made Balance of high reputation, in widespread use. Dimensions, 16J4 inches long, 9 inches wide, 18^ inches high. Price, as above described $135.00 Price, with adjustable shelf for supporting beaker when taking specific gravities.

LABORATORY SUPPLIES AND CHEMICALS 1014 1022 1028 1034 1014 ALKALIMETER Bunsen's . 1050 1040 1042 1040 ANVIL, for Lead Buttons, 6"x6", planed on one side $1.20 1042 ANVIL, Plattner's, l^"xl^", for blowpipe work, polished steel. Z A l /2 Weight, about, Ibs 2J4 4^ 6^ 9 13 J4 17^ ^A 35 Per Ib $0.85 1056 ASBESTOS BOARDS, cut in squares. Useful as a wrapping for han- dles of apparatus which become heated, and to suspend retorts, crucibles, etc. Per Ib $0.40 1065 ASBESTOS WOOD, so-called Asbestos Lumber, harder than wood, acid and fireproof, in sheets 42x48 inches. ASPHALT TESTING APPARATUS 1066 1066 CEMENTATION MACHINE, Kirschbraun's. Either the 50, 100, 150, 200, 250, 300 or 350 gram test may be made with equal accuracy and speed by a simple substitution of weights. A complete extraction can be made in five minutes, which would require two hours by the filtering methods. $125.00 APPARATUS FOR WATER SAMPLING IN CREOSOTE OILS. This apparatus consists of a brass cylinder with a pointed, perforated bottom. See Journal of Industrial and Engineering Chemistry, April, 1911, March, 1913, and May, 1914. With specific grav- ity support and holder for weighing test tubes, with coun- terpoise. Release and Arrest Independent arrest for pans with automatic stop.

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We will assist in every way possible, the adjustment of such claims. There is also a large drawer located in the base for keeping the testing pans, ther- mometer and other accessories. 1085 30 1087 SEPARATORY FUNNEL, with stopcock, capacity, 120 c.c 3.00 1088 COPPER STILL, with steel clamps, inside dimensions, 6x3^ inches, with six paper gaskets 15.25 1088a COPPER STILL, Same as No. e., inside dimen- sions, 7^x5 inches 19.50 1089 RING BURNER, brass, to fit small Still No. 1099c 1099b 1098 1099cl 1098 EXTRACTION APPARATUS, Barrett modification of the Cottle, or Underwriters' form. Made to special dimensions and with neck set at special angle, otherwise similar to regular retorts which, however, are not suited for this work 1.45 SPECIAL APPARATUS REQUIRED FOR ADDITIONAL CREOSOTE OIL TESTS 1099d SEPARATORY FUNNEL, with ground glass stopper and stopcock, grad- uated to 100 c.c.; for heavy oils $2.50 BAKING OVENS. 1105 Becker Balance equipped with chain, and gives direct rapid reading without rider or small weights. Short 7-inch cold rolled aluminum beam with 50 divisions on each side. ADVANTAGES 1st, produces uniform penetration tests; 2nd, controls the duration of tests; 3rd, applies uniformity of penetration weights; 4th, eliminates vibra- tion during operation; 5th, insures absence of personal equation. 1088 1.90 1089a RING BURNER, brass, to fit large Still No. Complete with flask, cover, coil and basket of Ger- man silver wire ." , $4.25 1098a GLASS FLASKS, only, for above Extraction Apparatus 60 1098b WIRE BASKET, of German silver, only for above Extraction Apparatus. .80 1098c COVER AND COIL, of block tin, only, for above Extraction Apparatus 3.00 SPECIAL APPARATUS REQUIRED FOR STANDARD CREOSOTE OIL DISTILLATION 1099 ASBESTOS SHEET, specially cut to fold into cover for retort $0.50 1099a THERMOMETER, graduated from to 400 C. Made specially for this test 5.00 1099b CONDENSER TUBE \'...'. For Baking Ovens, see the Despatch Electric Oven LABORATORY SUPPLIES AND CHEMICALS 15 CHAINOMATIC BALANCES ANALYTICAL CHAINOMATIC BALANCE NO. Polished mahogany case, front sliding frame, counterpoised. After all the necessary large weights up to 50 milligrams are placed on the pan, the weighing from 50 milligrams to 1/10 of a milligram can be concluded without opening the balance or using the arrest, eliminating the necessity of reading and re- placing all small weights or the handling of a rider with a consequent enormous saving of time. We are also in position to furnish a less expensive Chainomatic Balance of follow- ing specifications: No. 1105 Becker Balance equipped wtih chain, and gives direct rapid reading without rider or small weights. 1105 Capacity 100 grams Sensitiveness , 1/20 milligram Diameter of pans 3 inches Length of beam 6 inches Bearings ;..... Polished mahogany and glass case, glass top, front sliding frame counterpoised. We are prepared to furnish any apparatus both in Metalware and Glassware required on special tests, etc. 1062 1064 ASBESTOS PAPER, useful in filtering acids, etc., in rolls 36 inches wide any length, one yard, weighing about 1 Ib. The depth of penetration is read directly from the dial, each division of which corresponds to 0.1 mm. FOR SPECIAL TESTS the instrument may be adjusted for any variation desired. The heat is gen- erated from a ten-inch rmg burner below the oven, the outside is covered with asbestos, made of Russian iron $25.00 1079a DRYING OVEN. 1079, but made of copper 35.00 1080 BITUMEN HOLDER. 3.00 1080 1081 1081 DULIN ROTAREX, de- signed for the determination of Mineral Aggregate in Bituminous pavements. APPARATUS FOR TESTING COAL TAR AND REFINED TARS, OILS AND PITCHES DERIVED THEREFROM As adopted in the Standard Methods of the Barrett Manufacturing Company, New York. An American made Balance of high reputation, in widespread use. Dimensions, 16J4 inches long, 9 inches wide, 18^ inches high. Price, as above described $135.00 Price, with adjustable shelf for supporting beaker when taking specific gravities. LABORATORY SUPPLIES AND CHEMICALS 1014 1022 1028 1034 1014 ALKALIMETER Bunsen's . 1050 1040 1042 1040 ANVIL, for Lead Buttons, 6"x6", planed on one side $1.20 1042 ANVIL, Plattner's, l^"xl^", for blowpipe work, polished steel. Z A l /2 Weight, about, Ibs 2J4 4^ 6^ 9 13 J4 17^ ^A 35 Per Ib $0.85 1056 ASBESTOS BOARDS, cut in squares. Useful as a wrapping for han- dles of apparatus which become heated, and to suspend retorts, crucibles, etc. Per Ib $0.40 1065 ASBESTOS WOOD, so-called Asbestos Lumber, harder than wood, acid and fireproof, in sheets 42x48 inches. ASPHALT TESTING APPARATUS 1066 1066 CEMENTATION MACHINE, Kirschbraun's. Either the 50, 100, 150, 200, 250, 300 or 350 gram test may be made with equal accuracy and speed by a simple substitution of weights. A complete extraction can be made in five minutes, which would require two hours by the filtering methods. $125.00 APPARATUS FOR WATER SAMPLING IN CREOSOTE OILS. This apparatus consists of a brass cylinder with a pointed, perforated bottom. See Journal of Industrial and Engineering Chemistry, April, 1911, March, 1913, and May, 1914. With specific grav- ity support and holder for weighing test tubes, with coun- terpoise. Release and Arrest Independent arrest for pans with automatic stop.

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