BOILEE No. 5. 



81 



The extreme difference in these figures is $1.23, which cor- 

 responds to 15 per cent., and this occurs between the anthra- 

 cite coal, which is the most easily worked, and the mixed fuel 

 containing culm, which requires the most labor in firing. If 

 one fireman be assumed capable of handling ten tons of anthra- 

 cite coal, broken size, per day, and his wages are $2.00 per 

 clay, the cost of fireman's labor represents 3.6 per cent, of the 

 cost of fuel. A saving of 15 per cent, in the cost of fuel, 

 when using 10 tons per day of the mixture named, is sufficient 

 to cover the increased cost of labor due to the employment of 

 another fireman, and still have 11.4 per cent, remaining for a 

 net saving. 



Additional tests were made on Boiler No. 5, using Franklin 

 and Kalmia coal, each of which was quoted at $6.75 per ton. 

 The Franklin coal gave an evaporation of 9.78 pounds of water 

 from and at 212 degrees per pound of coal, and the Kalmia 

 coal, 9.68 pounds. The percentage of ash in each of these 

 coals was 10.8 per cent., while in the Lacka wanna, on Test No. 

 8 the percentage was 14.2. It is evident that the improved 

 performance with these coals Avas due simply to the greater 

 proportion of combustible matter which the coal contained. 



Boiler No. 6. 



. Horizontal return tubular. 

 . One. 



Sixty-three. 



( Mixture two parts Screenings, 

 \ one part Nova Scotia Culm. 

 Age, ........ Several years. 



Kind of boiler, 



Number used, 



Horse-power ( basis 12 square feet), 



Kind of coal, 



