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



287 



No. 6866. 



No. 6872. 



No. 6874. 



No. 6882. No. 6884. 



No. 6886. 



6858. GAS DISTRIBUTOR, with three side tubes with stop-cocks, and no center burner $5.50 



6860. GAS DISTRIBUTOR, with four side tubes and center burner, all with stop-cocks 7.70 



GAS DRYING APPARATUS, see Drying Apparatus. 



6866. GAS FILTER, of glass, for determining dust in furnace and other gases, with ground in con- 

 necting tube and projections to support extraction thimble. Length of enlarged portion, 2% 

 inches; diameter at top, 2% inches; diameter of connecting tube at top, 1 inch. Without 



thimble 3.50 



GAS GENERATING MACHINE, see Gas Machines No. 6936. 

 6872. GAS GENERATING BOTTLES, without fittings. 



Capacity, pints % 1 2 4 



Each . .' 17 .22 .30 .45 



6874. GAS GENERATING BOTTLES, same as No. 6872, but fitted with rubber stopper, funnel tube 



and delivery tube. Capacity, pints % 1 2 4 



Each 50 .55 .67 .90 



6882. GAS GENERATOR, Dropping, Freas, an effective, cleanly, economical method of obtaining any 



gas desired for use. Without flask 5.00 



6884. GAS GENERATOR, Hind's, for hydrogen sulphide and other gases; intended for individual 

 use. Complete with stop-cock funnel tube, stop-cock delivery tube and rubber stopper. (See 



Journal of American Chemical Society, Vol. yxxilf, page 384) 5.00 



6886. GAS GENERATOR, Improved Automatic, of stoneware. A simple and efficient generator for 

 the production of hydrogen sulphide, carbon dioxide, hydrogen and other gases in consider- 

 able quantity for industrial and college laboratories. In use, the long upright column is filled 

 nearly full of the necessary solid reagent and the lower reservoir with water. The fittings 

 are then put in place and the upper reservoir filled with the liquid reagent. Normal pressure 

 is soon generated, and as soon as the tension T is obtained in the lower reservoir, acid is auto- 

 matically delivered to the top of the column as required and the generator is ready for con- 

 tinuous operation with very little further attention. The upper reservoir and the lower res- 

 ervoir and column are of acid-proof chemical stoneware and all necessary glass parts and 



rubber stoppers are furnished 25.50 



fi887. LOWER RESERVOIR and Column only of No. 6886 16.50 



6888. UPPER RESERVOIR only of No. 6886". 4.50 



6889. GLASS DISTRIBUTOR of No. 6886 1.25 



6S96. GAS GENERATORS, Kipp's Apparatus, of glass, complete with safety funnel tube, stopcock, 



ground-in glass stopper, and rubber stoppers. Capacity, cc 500 1000 2000 



Each ". $9.00 11.00 15.00 



6898. STOPCOCK only of No. 6896 1.75 



6899. FUNNEL TUBE only of No. 6896 40 



