Gradup tube

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass.

Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc.

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

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass. Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc. 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. The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep . 1011 The apparatus consists of a specially constructed copper still, gas heated, with a copper condenser, water cooled. The indicator works automatically and gives absolutely correct readings $55.00 1069 1070 1070 ADHESION MACHINE, Kirschbraun's. A set of adjustable weights is provided permitting the use of either 50 or 100 gram loads in addition to the standard of 100 grams. 6409 5th Edition 6018 Foreword IN presenting this catalog for your consideration, we wish to call your attention to some of its most distinctive features.

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Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass.

Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc.

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.

The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep .

.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

In the selection and arrangement of .descriptive data and illustrations, we have been guided by the requirements of those who may have occasion to use the catalog.

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

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass. Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc. 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

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass. Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc. 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. The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep . 1011 The apparatus consists of a specially constructed copper still, gas heated, with a copper condenser, water cooled. The indicator works automatically and gives absolutely correct readings $55.00 1069 1070 1070 ADHESION MACHINE, Kirschbraun's. A set of adjustable weights is provided permitting the use of either 50 or 100 gram loads in addition to the standard of 100 grams. 6409 5th Edition 6018 Foreword IN presenting this catalog for your consideration, we wish to call your attention to some of its most distinctive features.

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Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass.

Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc.

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.

The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep .

.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

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass.

Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc.

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

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass. Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc. 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. The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep . 1011 The apparatus consists of a specially constructed copper still, gas heated, with a copper condenser, water cooled. The indicator works automatically and gives absolutely correct readings $55.00 1069 1070 1070 ADHESION MACHINE, Kirschbraun's. A set of adjustable weights is provided permitting the use of either 50 or 100 gram loads in addition to the standard of 100 grams. 6409 5th Edition 6018 Foreword IN presenting this catalog for your consideration, we wish to call your attention to some of its most distinctive features.

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Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass.

Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc.

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.

The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep .

.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

In the selection and arrangement of .descriptive data and illustrations, we have been guided by the requirements of those who may have occasion to use the catalog. 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 [[

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass. Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc. 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. The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep . 1011 The apparatus consists of a specially constructed copper still, gas heated, with a copper condenser, water cooled. The indicator works automatically and gives absolutely correct readings $55.00 1069 1070 1070 ADHESION MACHINE, Kirschbraun's. A set of adjustable weights is provided permitting the use of either 50 or 100 gram loads in addition to the standard of 100 grams. 6409 5th Edition 6018 Foreword IN presenting this catalog for your consideration, we wish to call your attention to some of its most distinctive features.

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Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass.

Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc.

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.

The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep .

]].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. 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.

.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 [[

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass. Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc. 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. The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep . 1011 The apparatus consists of a specially constructed copper still, gas heated, with a copper condenser, water cooled. The indicator works automatically and gives absolutely correct readings $55.00 1069 1070 1070 ADHESION MACHINE, Kirschbraun's. A set of adjustable weights is provided permitting the use of either 50 or 100 gram loads in addition to the standard of 100 grams. 6409 5th Edition 6018 Foreword IN presenting this catalog for your consideration, we wish to call your attention to some of its most distinctive features.

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Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass.

Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc.

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.

The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep .

]].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.

The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep .

.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 [[

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass. Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc. 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. The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep . 1011 The apparatus consists of a specially constructed copper still, gas heated, with a copper condenser, water cooled. The indicator works automatically and gives absolutely correct readings $55.00 1069 1070 1070 ADHESION MACHINE, Kirschbraun's. A set of adjustable weights is provided permitting the use of either 50 or 100 gram loads in addition to the standard of 100 grams. 6409 5th Edition 6018 Foreword IN presenting this catalog for your consideration, we wish to call your attention to some of its most distinctive features.

||

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass.

Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc.

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.

The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep .

]].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. The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep . 1011 The apparatus consists of a specially constructed copper still, gas heated, with a copper condenser, water cooled. The indicator works automatically and gives absolutely correct readings .00 1069 1070 1070 ADHESION MACHINE, Kirschbraun's. A set of adjustable weights is provided permitting the use of either 50 or 100 gram loads in addition to the standard of 100 grams. 6409 5th Edition 6018 Foreword IN presenting this catalog for your consideration, we wish to call your attention to some of its most distinctive features.

.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.

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.

.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 [[

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass. Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc. 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. The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep . 1011 The apparatus consists of a specially constructed copper still, gas heated, with a copper condenser, water cooled. The indicator works automatically and gives absolutely correct readings $55.00 1069 1070 1070 ADHESION MACHINE, Kirschbraun's. A set of adjustable weights is provided permitting the use of either 50 or 100 gram loads in addition to the standard of 100 grams. 6409 5th Edition 6018 Foreword IN presenting this catalog for your consideration, we wish to call your attention to some of its most distinctive features.

||

Our GLASS BLOWING DEPARTMENT is adequately equipped to repair and make up all kinds of standard and special apparatus, either plain, graduated or ground. A very useful and simple device, whereby the carrying and tilting of carboys, otherwise a difficult and dangerous operation, becomes easy and their 'contents can be poured out with safety. Designed to meet the needs of educational and commercial laboratories for an economical analytical balance. For detailed information write to our Balance Department. The case is made of seasoned mahogany, and French polished glass.

Our BALANCE and INSTRUMENT REPAIR DEPARTMENT has been or- ganized to inspect and repair any imported or domestic balances and instruments. The carrying bars are clamped to the carboy by means of two screw bolts, which rest on the cleats of the box; these bars are of such length as to project beyond the end of the box and provide handles for carrying. Size l l / 2 inches long, 2^ inches deep, 8^ inches high. PULP BALANCES 1127-1129 1131-1137 Pulp Balances illustrated above are used for Prescriptions, Ore, Sugar, Pulp, Jewelry, etc.

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.

The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep .

]].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.

The necessity for this apparatus has been brought about by the stringent requirements of the law, limiting the percentage of alcohol which these beverages (so-called "near" beers) are permitted to contain. This machine has a standard stretch of 150 centi- meters with a 5 cm. The stationary dial is graduated into 100 divisions of 1/10 m.m, each. Standard Penetrometer 1071 1072 1071 PENETROMETER, Standard, New York Testing Laboratory Type, for measuring the depth of penetration of a standard needle into the material to be tested at 77 F. in 5 seconds of time under a 100 gram weight; with standard clock reading in y 2 seconds and dial graduated to 1/10 mm. Dial has red graduations so that black pointer is easily observed. Case of seasoned mahogany 17 inches long, 17 l / inches high by inches deep .

[[

In the selection and arrangement of .descriptive data and illustrations, we have been guided by the requirements of those who may have occasion to use the catalog.

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.

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.

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In the selection and arrangement of .descriptive data and illustrations, we have been guided by the requirements of those who may have occasion to use the catalog. 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. 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.

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