160 



CENTRAL SCIENTIFIC CO., CHICAGO, U. 8. A. 



Nos. 3120-2. 



COMBUSTION APPARATUS 



3120. COMBUSTION APPARATUS, C. M. Johnson's, for 



the determination of carbon in iron, steel, ferro- 

 alloys, etc. With this outfit a single combustion can 

 be completed in 25 minutes. Complete as illustrated 

 with Hoskins Electric Combustion Furnace, mer- 

 cury pressure gage, drying jar for solid absorbents, ( 

 safety jar for potassium hydroxide solution, calcium ' 

 chloride and soda lime jars, mercury valve, fused 

 silica combustion tube, jar for granular zinc, jar for 

 phosphorus pentoxide, absorption tube for carbon 

 dioxide, and connections. (See "Rapid Methods for 

 the Chemical Analysis of Special Steels, Steel Mak- 

 ing Alloys, and Graphite," by C. M. Johnson.) 



No. 



No A B 



h With furnace and rheostat for, volts 110 220 



Each $50.00 50.00 



3122. COMBUSTION APPARATUS, C. M. Johnson's, same as No. 3120, but with Multiple Unit Elec- 



tric Combustion Furnace No. 6226. 



No A B 



With furnace and rheostat for, volts 110 220 



Each 50.00 60.00 



Parts for Johnson's Combustion Apparatus. 



Hoskin's Electric Combustion Furnaces. 



No A B 



For volts 110 220 



6210. Furnace only 25.00 25.00 



6211. Furnace with rheostat 33.50 33.50 



Multiple Unit Electric Combustion Furnace, for use on either 110 or 220 volts. 



6226. Furnace only 25.00 



6227. Furnace with rheostat (voltage must be specified) 33.50 



3186B. Combustion Tube, of opaque fused silica for Nos. 3120 and 3122, 24 inches long and % inch inside 



diameter i 6.00 



3123. Mercury Pressure Gage, (A) to indicate leakage of joints or stoppage of flow 90 



3124. Jar for Solid Absorbent, (B) such as potassium hydroxide sticks 1.50 



3125. Safety Jar, (C) for potassium hydroxide solution 1.50 



3126. Calcium Chloride Jar, (D) 1.50 



3127. Soda Lime Jar, (E) 1.50 



3128. Mercury Valve, (F) to prevent back flow 80 



3129. Jar for Granular Zinc, (H) to absorb acid, lead, sulphur, and chlorine vapors 80 



3130. Jar for Phosphorus Pentoxide, (I) to absorb water 60 



3131. Absorption Tube, for Carbon Dioxide, (J) to be weighed for calculating percentage of carbon 



1.00 



Combustion Tube, Clay, C. M. Johnson's, see No. 3178. 



3134. MILLING MACHINE, C. M. Johnson's, for obtaining iron and steel samples for use in combus- 

 tion apparatus 42.00 



3136. "Rapid Methods for the Chemical Analyses of Special Steels, Steel Making Alloys, and Graphite' ' 

 by C. M. Johnson, describing No. 3120 Combustion Apparatus 3.00 



