CENTRAL SCIENTIFIC CO., CHICAGO, TJ. 8. A. 



21 



No. 363. 



358. 



DISTILLATION APPARATUS for Tars, American Society for Testing Materials Type, as de- 

 scribed in Bulletin 314 of the United States Department of Agriculture, and in Standard 

 Method D20-16 for the Distillation of Bituminous Materials Suitable for Road Treatment. Con- 

 sists of a 250 ec Pyrex Engler flask, supported on a ring stand and surrounded by a metal 

 shield with sight hole. The side arm is connected by a rubber stopper to a special type of 

 condenser. Complete with flask, shield, condenser, 25 cc graduate, support stand, two clamps 

 and 4 inch ring, but without burner or thermometer S6.00 



THERMOMETER for No. 358, see No. 350. 



360. DRYING OVEN, New York Testing Laboratory Type, of Russia iron, double walled, covered 



with asbestos. The heat is supplied by a 10 inch ring burner immediately beneath the air 

 space between the two walls. The interior of the oven is provided with a perforated shelf, 

 beneath which is a fan for insuring even temperature. The cover is hinged and provided 

 with openings for thermometer, thermo-regulator, etc. Height, 20 inches; diameter, 11 inches. 

 Without thermometer and thermo-regulator 27.50 



361. DRYING OVEN, of same construction as No. 360, but of copper 37.50 



362. DUCTILITY MACHINE, Smith's, improved form, for hand power, built in a stone trough 



heavily enamel painted both inside and out. Arranged for 110 em pull, and for three bri- 

 quettes. All working parts are of brass. With hand wheel 160.00 



363. DUCTILITY MACHINES, Smith's, improved form, electrically driven, with direct connected 



motor. 



No A B C D 



A. C. D. C. 



For. volts 110 220 110 220 



Price 225.00 250.00 200.00 225.00 



