194 



BOILER TESTS. 



Ratio of water-heating surface to grate surface, . . . 21.1 to 1 



Ratio of steam-heating surface to grate surface, . . . 10.7 to 1 



Ratio of total heating surface to grate surface, . . . 31.8 to 1 



Ratio of grate to tube area, . . . . . . . 11 to 1 



Ratio of grate to flue area, 16.1 to 1 



Results of Tests, Boiler No. 54. 



NOTE. The coal when fired contained 10 per cent, of moisture. 



The first two tests on Boiler No. 54, viz., tests No. 

 109 and No. 110, had for an object the determination of 



