252 INDEX. 



Superheating boilers, Comparison between saturated steam boilers and, 22. 



Superheating calorimeter, 18. 



Superheating steam in an independent superheater, 28, 69. 



Superheating to different degrees with cast iron sectional boiler, 211. 



Superheating with cast iron sectional boiler, 215. 



Superheating with horizontal tubular boiler, 154. 



Table No. 1, Kesults of tests of horizontal tubular boilers, 24. 



Table No. 2, Results of tests of vertical tubular boilers, 25. 



Table No. 3, Results of tests of horizontal tubular boilers with high flue 



temperature, anthracite coal, 29. 

 Table No. 4, Results of tests of horizontal tubulars boilers, with low flue 



temperature, anthracite coal, 29. 

 Table No. 5, Results of tests of horizontal tubular boilers with Cumberland 



coal, 30. 



Table No. 6, Results of tests of water tube boilers, 41. 

 Table No. 7, Comparative results of tests with different fuels, referred to 



anthracite coal, 44. 

 Table No. 8, Comparative cost of coal and labor with different fuels, foi 



1000 H. P. plant, 47. 



Table No. 9, Summary of tests with flue heaters, 57. 

 Table No. 10, Influence of flue heater on the draught, 59. 

 Temperature and draught suction, Method of determining, 16. 

 Tube opening to grate surface, Effect of proportion of, upon economy, 



34. 

 Tubes, Effect of size of, upon economy, 35. 



Use of additional heating surface applied to boiler in furnace, 61. 



Value of superheated steam for motive power, 23. 



Vertical tubular boilers, 22, 39, 183, 187, 190, 192, 196, 199, 201, 203, 



205, 208. 



Vertical tubular boiler with interior chamber, 187, 190. 

 Vertical tubular boilers with flue heater, 205. 

 Vertical tubular fire-box boilers, 27, 187, 203, 208. 

 Vertical tubular rolling-pin boilers, 183, 192, 201. 



Water leg front, Boilers with, 38, 89, 107. 



Water tube boilers, 217, 219, 221, 222, 224, 228, 230, 231. 



Water tube boilers, Relative economy of, 40. 



Wet steam produced by discharging water into steam space, 72. 



Wetting bituminous coal, Economy of, 62, 167. 



