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BOILEE TESTS. 



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BOILER No. 23, LONGITUDINAL SECTION. 



Dimensions of Boiler No. 23. 

 Diameter of shell, ........ 



Length between heads and length of tubes, . 

 Number of tubes ( collective) 3 inches outside diameter, 

 Area of heating surface, ....... 



Area of grate surface, 



Area through tubes, 



Area through flue, ........ 



Height of chimney, ........ 



Width of air spaces and metal bars in grates, 



Distance of grate to shell, ...... 



Distance of flat bridge to shell, ..... 



Katio of heating surface to grate surface, 



Ratio of grate surface to tube area, .... 



Ratio of grate surface to flue area, ..... 



Results of Test, Boiler No. 23. 



Test No. 58. 

 Manner of start and stop and kind of run, .... Ordinary. 



Duration, ........... 10.7 hrs. 



Coal consumed, dry ( including wood equivalent ), . 9,901 Ibs. 



Percentage of ash, ......... 15.7 per cent. 



Coal per hour, 927.9 Ibs. 



Coal per hour per square foot of grate, ..... 10.3 Ibs. 



Water per hour, 6,979.8 Ibs. 



Water per hour per square foot of heating surface, . . 1.3 Ibs. 



Horse-power developed, ...... 241.5 H. P. 



