TESTS ILLINOIS. 
CHEMICAL ANALYSES. 
61 
Laboratory number. 
Air-drying loss 
Moisture ,. 
Volatile matter 
Fixed carbon 
jAsh 
[Sulphur 
Hydrogen 
Carbon 
Nitrogen 
Oxygen 
Calorific value determined: 
Calories 
British thermal units. 
Car 
sample. 
1627 
4.40 
13.20 
34.33 
39. 94 
12.53 
4.47 
5.51 
57. 25 
1.02 
19.22 
5, 841 
10,514 
STEMMING TESTS. 
Test 101, Illinois No. 8. 
Size as shipped, nut. Size as used, over 1 inch, 58 
per cent; § inch to 1 inch, 21.9 per cent;J inch to 
J inch, 8.7 per cent; under J inch, 11.4 per cent. 
Duration of test, 10.03 hours. Kind of grate, 
rocking. 
Test 102, Illinois No. 8. 
Size as shipped, nut. Size as used, over 1 inch 
50.4 per cent; § inch to 1 inch, 25.5 per cent; \ inch 
to I inch, 10.6 percent; under \ inch, 13.5 per cent. 
Duration of test, 10 hours. Kind of grate, plain. 
MISCELLANEOUS ITEMS. 
Heating value of coal B. T. U. per pound dry coal 
Force of draft: 
Under stack damper inch water 
Above fire do.. 
Furnace temperature °F 
Dry coal used per square foot of grate surface per hour pounds. 
Equivalent water evaporated per square foot of water-heating surface per hour 
pounds . 
Percentage of rated horsepower of boiler developed 
Water apparently evaporated per pound of coal as fired pounds 
Water evaporated from and at 212 °F.: a 
Per pound of coal as fired do.. 
Per pound of dry coal do . . 
Per pound of combustible do. . 
Efficiency of boiler, including grate percent 
Coal as fired: 
Per indicated horsepower hour do.. 
Per electrical horsepower hour do. . 
Dry coal: 
Per indicated horsepower hour do.. 
Per electrical horsepower hour. .., do. . 
a A better evaporation would have been obtained if boilers and gas-sampling apparatus had been in 
better condition, as they were later. 
