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(The above machine is described in the Journal of the Industrial and Engineering Chemistry, Volume 6, No. Softening point is temperature at which specimen has dropped one inch. For temperatures above 95 C., gylcerine should be used instead of water. DESCRIPTION The entire instrument is automatic and is operated by two ordinary dry cells. Set consisting of two plates, each with six corrugations, and one mould .00 1074 1074 EXTRACTOR. For the analysis of paving mixtures containing broken stone. (Detail information and instruc- tions furnished upon request.) Complete extractor .00 1075 1075 RING AND BALL, for melting point test

(The above machine is described in the Journal of the Industrial and Engineering Chemistry, Volume 6, No. Softening point is temperature at which specimen has dropped one inch. For temperatures above 95 C., gylcerine should be used instead of water. DESCRIPTION The entire instrument is automatic and is operated by two ordinary dry cells. Set consisting of two plates, each with six corrugations, and one mould $5.00 1074 1074 EXTRACTOR. For the analysis of paving mixtures containing broken stone. (Detail information and instruc- tions furnished upon request.) Complete extractor $35.00 1075 1075 RING AND BALL, for melting point test $1.00 NOTE: We are in position to furnish special apparatus for testing various grades of tar, ^ oils, etc. For Hydrometers, Thermometers, Metronomes and Stop-Watches used in connection with asphalt testing see under individual headings. The stein is calibrated in feet and inches, thus facilitating the zone sampling. Complete lists of both the special and regular stock apparatus required for the various tests will be sent upon request.

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(The above machine is described in the Journal of the Industrial and Engineering Chemistry, Volume 6, No. Softening point is temperature at which specimen has dropped one inch. For temperatures above 95 C., gylcerine should be used instead of water. DESCRIPTION The entire instrument is automatic and is operated by two ordinary dry cells. Set consisting of two plates, each with six corrugations, and one mould $5.00 1074 1074 EXTRACTOR. For the analysis of paving mixtures containing broken stone. (Detail information and instruc- tions furnished upon request.) Complete extractor $35.00 1075 1075 RING AND BALL, for melting point test $1.00 NOTE: We are in position to furnish special apparatus for testing various grades of tar, ^ oils, etc. For Hydrometers, Thermometers, Metronomes and Stop-Watches used in connection with asphalt testing see under individual headings. The stein is calibrated in feet and inches, thus facilitating the zone sampling. Complete lists of both the special and regular stock apparatus required for the various tests will be sent upon request.

12, Decem- ber, 1914) $85.00 1067 ASPHALT BRIQUETTE MOULD 5.00 LABORATORY SUPPLIES AND CHEMICALS 1067a STANDARD METHOD FOR DETER- MINING THE SOFTENING POINT OF BITUMINOUS MATERIALS OTHER THAN TAR PRODUCTS 1067a OPERATION Carefully melt sample and till ring with material to be tested. Place ball in center of ring and suspend in beaker containing approximately 400 c. It is enclosed in a mahogany case with glass sash, lock and key. 1085 1086 1087 1089 1091 1088 SPECIAL APPARATUS REQUIRED FOR WATER IN TAR TEST 1085 CONDENSER TROUGH, of copper, on supports, with wooden base $ 8.00 1086 CONDENSER TUBE, of glass to fit Condenser Trough No. 1105 Price $ 90.00 Price, mounted on black plate glass "..../ 100.00 LABORATORY SUPPLIES AND CHEMICALS 17 BALANCES ANALYTICAL We have listed herein, the most popular Balances of American makes, and can supply any Balance not listed, on short notice. This world-famous Balance meets the most exacting demands of the analytical chemist.

.00 NOTE: We are in position to furnish special apparatus for testing various grades of tar, ^ oils, etc. For Hydrometers, Thermometers, Metronomes and Stop-Watches used in connection with asphalt testing see under individual headings. The stein is calibrated in feet and inches, thus facilitating the zone sampling. Complete lists of both the special and regular stock apparatus required for the various tests will be sent upon request.

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.

Any complaints will be promptly and cheerfully investigated and complete satisfaction is assured.

All prices are based upon actual market conditions and are subject to change without notice. Where no definite shipping instructions are furnished with order, we will use our own judgment, and ship by shortest and cheapest route.

Under proper heat control, the distillate is collected in the cylinder as shown above. For testing comparatively the adhesive strength of asphalt as a binder for mineral conglomerates in the construction of asphalt pave- ments. See "The Modern Asphalt Pavement" .00 1071a PENETROMETER, Miniature, exactly similar to the above but one-half the size and specially designed for engineers' portable use in making comparative tests, without clock 25.00 HOYT'S ELECTRICAL PENETROMETER 1072 HOYT'S An electrically operated, automatic instrument for determining the consistency of asphalt and similar substances by measuring the depth to which a standard needle with a definite load will penetrate during a definite period of time, at a given temperature.

An aliquot portion is withdrawn and the percentage of alcohol read with an alcoholometer. Complete with two sample cups and in- structions 23.00 1070a EXTRA CUP for No. FOR THE STANDARD TEST THE LEFT PUSH BUTTON IS PRESSED.

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