248 INDEX. 



Coal, Shamokiu Pea, 219. 



Coal, Walston bituminous, 49, 145, 156. 



Coal, White Ash Broken, 118, 131. 



Coal, Wilkesbarre, 154. 



Coke, Boilers using, and economy of same, 50, 139, 178. 



Combustion chamber or space behind bridge wall, Arrangement of, 51. 



Commercial tests, Engineering tests and, 11, 12. 



Comparison between boiler with air admission, and boiler without air 



admission, above fuel, 52, 123, 132. 

 Comparison between boiler with three inch tubes, and boiler with three and 



a half inch tubes, 35, 134. 



Comparison between different kinds of boilers, 36. 

 Comparison between double-deck boilers and ordinary horizontal tubular 



boilers, 39, 162. 

 Comparison between economy of different kinds of fuel, 43, 109, 113, 116, 



149, 162, 196. 

 Comparison between saturated steam boilers and superheated steam boilers, 



22. 



Comparison between vertical boilers and horizontal tubular boilers, 23, 186. 

 Comparative draught required for different fuels, 48, 49, 119. 

 Comparative labor of firing different fuels, 80, 119. 

 Computing results, Method of, 19, 20, 21. 

 Conducting ideal tests, Method of, 12. 

 Conducting tests given in Part II, Method of, 13, 14, 15. 



Detached furnace, Boilers with, 36, 86, 149. 



Direct tubular boiler with common furnace, 104. 



Direct tubular boilers with detached furnace, 86, 149. 



Direct tubular boilers with detached furnace, Comparative economy of, 37. 



Double-deck boilers, 159 to 171. 



Double-deck boilers, Comparative economy of, 39 163. 



Double furnace for alternate firing, Hor. Ret. Tub. boiler with, 38, 121. 



Double passage for products of combustion, Boilers with, 75. 98, 154. 



Draught with blower, Economy of artificial, 61, 88. 



Draught, Automatic vs. hand regulation of, 60, 94. 



Draught, Effect of flue heater on, 58. 



Draught for vertical boilers, 195, 202. 



Draught gauge, 16. 



Draught, Method of taking, 16. 



Economical temperature of escaping gases with anthracite and bituminous 



coal, 28, 31. 



Economy of carrying high water in vertical boiler, 187. 

 Economy of flue heaters, 56, 145, 174, 207, 226. 

 Economy of wetting bituminous coal, 61. 



Effect of admitting air above fuel in preventing smoke, 53, 62, 113, 137, 159. 

 Effect of admitting air above fuel upon flue temperature, 113. 

 Effect of admission of air through unsound brick work upon draught and 



economy, 26, 201, 215, 232. 



