22 



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



No. 366. 



No. 370. 



No. 372. 



No. 372. 



No. 368. 



364. 



3G6. 



5227. 



366A. 



366B. 



368. 



370. 

 372. 



EVAPOKATOR, Brown. Will reduce asphaltic petroleums to asphalt in %th the time usually 

 required by the ovens commonly used, giving results that will agree among themselves. Con- 

 sists of a cylindrical iron oil bath, 4 inches high by 18 inches in diameter, fitted with a 

 stirring device mounted vertically with a grooved pulley at the top for belting to a motor. 

 The top of the bath is of aluminum with pockets for the brass evaporating dishes. A special 

 ring gas burner supplies heat under the entire bottom of the oil bath. Complete with wells 

 for thermometer, air gage, vent pipe, opening for filling, and a set of brass evaporating 



dishes $53.00 



EXTRACTION APPARATUS, American Society for Testing Materials type, for free carbon 

 in tars and pitches. Consists of a flask of special shape, with spiral metal condenser of 



Cottle form, and wire support for filter cup 4.50 



CONDENSER only of No. 366, of block tin with cover attached 2.25 



FLASK only of No. 366 1.25 



WIRE SUPPORT only of No. 366 1.00 



EXTRACTION APPARATUS, New York Testing Laboratory Type, for the extraction of bi- 

 tuminous material from paving mixtures containing broken stone. Consists of a metal cylin- 

 der, inside which fits a second cylindrical metal vessel which holds the solvent. A wire 

 basket holding 500 grams of the disintegrated paving material is suspended in the inner 

 vessel, and an inverted conical condenser provided with outlets for water circulation is 

 placed in the top. The heat is supplied by a 16 C. P. incandescent lamp, mounted on the wood- 

 en base and projecting into the bottom of the outer cylinder. With 175 to 200 cc of carbon 

 disulphide, 500 grams of sample should extract clean in three hours. Complete, without lamp 



bulb 35.00 



ALUNDUM THIMBLES for No. 366, see No. 5244. 



FLASH POINT TESTER, Elliott or New York State Board of Health Type, as modified by the 



Underwriters' Laboratories, with Bunsen burner and with Thermometer No. 13444 A 10.00 



FLOW PLATE AND MOLD for comparing fluidities of asphalt cements at their melting points. 

 Set consists of two flow plates, each with six corrugations, and mold 6.00 



