90 PRELIMINARY REPORT ON COAL-TESTING PLANT. [bull.2i 
sivelv and was easily handled. The greatest trouble in its use aro 
from its tendency to shrink away from the walls of the producer, 
was necessary, therefore, to break it against the walls about twi 
every hour. The lumps did not swell and fuse together, but seemi 
to keep apart in the lire. 
COAL, COLORADO NO. 1; PRODUCER-GAS TEST NO. 15. 
[Coal from Simpson mine of the Northern Coal and Coke Company, Lafayette, Colo.; tested Decern] 
13, 14, 1904.] 
Duration of test hours. . 30 
Total coal consumed in producer pounds. . 10, 933 
Moisture in coal per cent. . 20. 
Dry coal consumed in producer pounds. . 8, 720 
Refuse from dry coal per cent . . 7. 
Total refuse from coal pounds. . G40 
Total combustible consumed in producer . . .pounds. . 8, 080 
Coal consumed, pounds per hour. 
Coal consumed in producer 364. 
Dry coal consumed in producer 29( >. 
Combustible consumed in producer 269. 
Equivalent coal used by producer plant 428. 
Equivalent dry coal used by producer plant 341. 
Equivalent combustible used by producer plant 316. 
British thermal units. 
Per pound of coal as fired 9, 767 
Per pound of dry coal 12, 245 
Per pound of combustible 13, 210 
Per cubic foot of standard gas 1 49 
From standard gas, per pound dry coal burned in producer 7, 860 
From standard gas, per hour per brake horsepower 9. 7( 10 
Gas produced, cubic feet ( reduced to standard). 
Total 460,300 
Per hour 15, 343 
Per pound coal consumed in producer 42. 
Per pound dry coal consumed in producer 52. 
Per pound combustible consumed in producer 57 
Per pound equivalent coal used by producer plant 35. 
Per pound equivalent dry coal used by producer plant 44. 
Per pound equivalent combustible used by producer plant 48. 
Horsepower developed. 
Average electrical horsepower available for outside purposes 186. 
Average electrical horsepower developed at switch board 200. 
Average brake horsepower f available for outside purposes 219. 
Average brake horsepower t developed at engine 235. 
t Based on an assumed efficiency of 85 per cent for generator and belt. 
