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



281 



No. 6692. 



Nos. 6676-7. 



No. 6678. 



No. 6694. 



6676. GAS ANALYSIS APPARATUS, Williams' Improved, Model A, for the complete analysis ol 

 combustible gases, with special form of bubbling pipettes designed to increase the rapidity 

 of absorption and to decrease the possibility of breakage. Complete with four special bub- 

 bling pipettes with stop-cocks, filled with glass tubes, manifold tube, water-jacketed measur- 

 ing burette with stop-cock, leveling bottle, three-way stop-cock and aspirator pump, in pol- 

 ished oak case lined with rubber. Height, 17% inches; width, 12 inches; depth, 4 

 inches $50.00 



6fi77. PORTABLE EXPLOSION COIL for use with Xo. 6676 in determining methane. Complete with 

 batteries in polished oak case 7.50 



6678. GAS ANALYSIS APPARATUS, Williams' Improved, Model B, for analysis of flue gases, sim- 

 ilar in construction to No. 6676, but with three bubbling pipettes for determining CO2, CO, 

 and O 2 . Complete with three pipettes with stop-cocks and glass tubes, manifold tube, water- 

 jacketed burette with stop-cock, leveling bottle, three-way stop-cock and aspirating pump, 

 in polished oak case, lined with rubber. Height, 17% inches; width, 9% inches; depth, 4 



inches 35.00 



GAS APPARATUS, Bunsen-Fresenius, for chlorine, see Chlorine Absorption Apparatus. 



6692. GAS APPARATUS, Chancel's, for determining the specific gravity of gases. With ground in 

 stop-cock tube and side arm 4.50 



6694. GAS APPARATUS, Elliotts' Improved Form, for determining sulphur in illuminating gas, as 

 described in Technologic Paper No. 20 and Circular No. 48 of the United States Bureau of 

 Standards. Complete with burner, trumpet tube, towers filled with glass marbles and con- 

 necting tubes, mounted on support, without beakers 25XX) 



