18 



CENTRAL SCIENTIFIC CO., CHICAGO. U. S. A. 



APPARATUS FOR TESTING ASPHALT, 

 CREOSOTE OIL, PITCH and COAL TAR 



No. 328. 



No. 330. 



No. 332. 



328, ADHESION MACHINE, Kirschbraun's, for measuring the adhesive strength of asphalt as a 

 binder for crushed rock in paving construction. Consists of a dynamometer reading to 250 

 grams in 10 gram divisions, mounted on a frame provided with a movable table for holding 

 box containing sample to be tested. A handle with a system of gears is used to press the 

 sample against the ball on the end of the dynamometer and then to remove it, the scale 

 recording the adhesive pull. As used in the Chicago Paving Laboratory. Complete with two 

 sample cups and directions $25.00 



330. ADHESIVEMETER, Brown's, for determining the index of adhesion of materials such as 



road oils and asphalts, by the time consumed for a standard rod to travel a given distance. 

 The results obtained check very closely. Consists of a rigid cast iron frame, mounted on 

 leveling screws; a steel rod, which is attached to counterbalancing weights by means of a 

 string over a frictionless pulley; and a cup for the samples, immersed in a water bath. .155.00 



331. GLASS CASE for No. 330, with electric heaters 60.00 



332. BALL AND RING APPARATUS, American Society for Testing Materials Type, as described 



in Tentative Method No. D36-16T for the Determination of the Softening Points of Bitumi- 

 nous Materials other than Tar Products. The apparatus consists of a 600 cc glass beaker, 

 an aluminum rack with two plates for the rings; a brass cover with hole for cork to hold 

 thermometer; two brass rings % inch in diameter, % inch deep with % 2 inch walls; and two 

 steel balls % inch in diameter, each weighing between 3.45 and 3.50 grams; with directions for 

 use. Without thermometer 10.00 



333. BALL AND RING only of No. 332 1.00 



13428A. THERMOMETER for No. 332, reading to to 220P 1.20 



