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BOILER TESTS. 

 Results of Tests, Boiler No. 17. 



NOTE. The pea coal when fired contained 5 per cent. O A moisture and the mixture 

 10 per cent. 



The tests on Boiler No. 17 had for a main object the deter- 

 mination of the relative economy of three different kinds of 

 fuel, viz: anthracite broken coal, anthracite pea coal, and a 

 mixture of pea and dust and Nova Scotia culm. In general, 

 the results do not show a high degree of economy. In view 

 of the small ratio of heating surface to grate surface, the rela- 

 tively large amount of power developed, compared with the 

 nominal power, and the resulting high temperature of the 

 waste gases, a somewhat unfavorable result would be expected. 

 Comparing the performance of the different fuels, the evapora- 

 tion with pea coal is 5. .5 per cent, less than that obtained with 

 broken coal , and the result obtained with the mixed fuel is 

 13.7 per cent, less than the same figure, these being based on 



