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



19o 



No. 4120. 



4138. 



4102. DISSOLVING TUBE, Freas, for dissolving solids which are difficultly soluble without the aid of 

 heat or mechanical agitation, and filtering the solution at the same time. The crystals are 

 placed in A upon a plug of asbestos or cotton. Suction is applied at B, which is then closed, 

 and a circulation starts upward through D and E down through C and F on account of the 

 different densities of the liquids. This will continue until the entire solution is of the same 

 density. Length over all without stop-cock, 37.5 cm; capacity, about 250 cc. With stop-cock, 

 but without bottle or rubber tubing $5.00 



DISTILLING APPARATUS FOR WATER 



4120. DISTILLING APPARATUS, Acme Automatic Water Still. Made to hang on wall and can be 

 placed wherever gas and water connections may most conveniently be made with pipes or rub- 

 ber tubing. Occupies space 12x4 inches on the wall, projecting only 14 inches in its widest 

 part. Fitted with removable cover to permit inspection if desired. Arranged to secure maxi- 

 mum amount of water for the minimum consumption of gas. Made of copper and brass, tin 

 lined and nickel-plated. Capacity, one gallon per hour and one half. With gas burner. 25.00 



4122. DISTILLING APPARATUS, Automatic Water Still, of heavy spun copper, nickel-plated, without 



seams. Can be used on Tripod No. 4123 over Buusen burner or any convenient source of heat. 

 Diameter of still, 11 inches; height, 13 inches; capacity, 3 quarts per hour with burner using 

 10 cubic feet of gas. With block tin outlet tube; without burner 29.00 



4123. TRIPOD SUPPORT for No. 4122 Distilling Apparatus. Diameter of rim, 10 inches; height 



7 inches 1.75 



4136. DISTILLING APPARATUS, Peerless Automatic, built on an entirely new principle, as the boiler 

 is so shaped that the steam is forced through the water to its center where it passes in a compact 

 body into the condensing tube, thus reducing the amount of condensation on the side walls of 

 the still. Because of this feature, it produces distilled water at a very low expense for gas. 

 The parts are readily accessible for cleansing. The boiling vessel is of cast iron and not easily 

 burned out or injured, by rough handling. The condensing tube is of heavy tinned copper, suf- 

 ficiently large to insure perfect condensation with a very small stream of water. Finished in 

 bright aluminum and lacquered brass. With gas burner. 



Capacity, gallons 1 3 



Each 21.00 42.50 



4138. DISTILLING APPARATUS, Ralston's New Process. May be used on any stove and does not 

 require water under pressure. The storage of the distilled water within the still prevents th? 

 reabsorption of gases. Although not entirely automatic, it is so constructed that it cannot boil 

 dry; it requires little care or attention. It is made of copper and pure tin. Capacity, from 

 1 to 3 quarts per hour, depending on the amount of heat used. Weight, 7 Ibs.; diameter, 

 9 inches; height, 14 inches , 12.00 



