378 



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



No. 9716. 





No. 9724. 



No. 9730. 



9716. MELTING POINT TESTER, for Wax, consisting of a glass cup for the wax to be tested, with 

 a removable metal top in which is set a thermometer graduated from 90 to 150F., in % 

 divisions. The melted wax is poured into the cup until it stands at an indicated level. The 

 cap with thermometer is then put in place and the instrument shaken until the wax shows 

 signs of congealing. The thermometer is then observed and the temperature at which the 

 mercury remains constant while the process of congealing continues is noted as the melting 

 point. By means of this instrument the melting point of a wax may be measured within 

 ViF. Complete as described with nickeled trimmings and with thermometer $10.00 



9720. OIL TABLES, Tycos, containing all the data concerning gravities, temperatures, conversion 

 tables, etc., which are of interest to the oil man 1.00 



9724. OIL TUBE, Muter's, for determining fatty acids in oils and fats. Graduated from to 100 cc 

 in 1 cc divisions, with ground stopper and stop-cock, on wooden support. (See Journal of 

 Association of Official Agricultural Chemists, Vol. II, No. 3, for November 15, 1916, page 

 309) 5.50 



SAMPLE BOTTLES, for Oil, see general heading Bottles. 

 SEPABATOEY FUNNELS, see general heading Funnels. 



9730. STILL, Brown Oil, for fractionations and general distillations, constructed to meet the most 

 exacting requirements. Th6 still is made of east iron surrounded by a cast iron frame, 

 mounted inside of a fire-brick furnace of the same general shape. The flame from the Bun- 

 sen burners plays between the frame surrounding the still and the fire-brick furnace. The 

 still proper is heated only by heat which passes through the walls of the iron frame sur- 

 rounding it. By this construction the top and bottom of the still may be kept at the same 

 temperature; or, if desired, the top can be kept heated to a higher temperature, or vice 

 versa, by a slight adjustment of the flame entering the fire chamber. It is necessary when 

 running an emulsified oil to keep the top of the still somewhat hotter than the bottom. The 

 still permits the use of a sample sufficient in size to afford cuts that can be treated or 

 otherwise examined; and it fractionates where fractionation is desired. Two large Bunsen 

 burners are included; one for heating the still, and one for generating steam. Capacity of 

 still, one gallon (half full). Complete as described with four vapor lines and discharge 

 pipes, condenser with four compartments, discharge outlet, steam generator and super-heater, 

 Bunsen burners, three thermometer openings and large opening for cleaning purposes, with 

 directions for uee '. 135.00 



For other STILLS for Oil, see general heading Distilling Apparatus. 

 STOP WATCHES, see general heading Stop Watches. 



