TESTS OHIO. 
CHEMICAL ANALYSES. 
157 
Mine samples. 
Boiler 
test 
sample. 
Laboratory number. 
Air-drying loss 
_2 [Moisture 
| | Volatile matter. 
x 
o 
Fixed carbon. 
(Ash 
(Sulphur 
Hydrogen 
Carbon 
Nitrogen 
Oxygen 
Calorific value determined: 
Calories 
British thermal units. 
STEAMING TESTS 
2090 
2.60 
6.28 
35.81 
50. (il 
7.30 
3.55 
7,056 
12,701 
2091 
2.20 
5.80 
36.89 
50. 73 
6.58 
2. 62 
Test 208, Ohio No. 7. 
Size as shipped, over l\ inches. Size as used, 
over 1 inch, 41.1 per cent; \ inch to 1 inch, 18.5 
percent; \ inch to \ inch, 14.1 percent; under \ 
inch, 26.3 per cent. Duration of test, 9.92 hours. 
Kind of grate, plain. 
Test 369, Ohio No. 7. 
2656 
2.60 
6.65 
33.94 
48.86 
10. 55 
3.13 
5.30 
67.38 
1.20 
12. 44 
6,766 
12, 179 
Size as shipped, over lj inches. Size as used, 
over 1 inch, 50.7 per cent; \ inch to 1 inch, 19.9 
percent; J inch to \ inch, 11.5 percent; under \ 
inch, 17.9 per cent. Duration of test, 8.27 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.: 
Per pound of coal as fired do 
Per pound of dry coal do 
Per pound of combustible do 
Efficiency of boiler, including grate per cent . . 
Coal as fired: 
Per indicated horsepower hour pounds. . 
Per electrical horsepower hour do 
Dry coal: 
Per indicated horsepower hour do 
Per electrical horsepower hour do 
Test 268. Test 
13,046 
13,079 
0.40 
0.55 
.13 
.18 
2,280 
2, 453 
15. 96 
18. 55 
2. 87 
3.24 
80.3 
90.9 
7.03 
6.85 
8.40 
8.20 
9.00 
8.76 
10. 37 
10. 06 
66.62 
64. 68 
3.37 
3.45 
4.16 
4.26 
3.14 
3.23 
3.88 
3.99 
