TESTS — ILLINOIS. 
89 
STEAMING TESTS. 
Test 140, Illinois No. 18. 
Size as shipped, lump. Size as used, over 1 inch, 
37.3 per cent; i inch to 1 inch, 22.2 per cent; \ inch 
to \ inch, 15.9 per cent; under \ inch, 24.6 per cent. 
Duration of test, 10 hours. Kind of grate, rock- 
ing. 
Test 147, Illinois No. 18, washed. 
Size as shipped, lump. Size as used, over 1 inch, 
9.5 per cent; \ inch to 1 inch, 25.5 per cent; \ inch 
to \ inch, 29.6 percent; under \ inch, 35.4 percent. 
Duration of test, 9.95 hours. Kind of grate, 
rocking. 
Test 148, Illinois No. 18. 
Size as shipped, lump. Size as used, over 1 inch, 
27.1 per cent; \ inch to 1 inch, 25.7 per cent; \ inch 
to J inch, 17.9 percent; under \ inch, 29.3 per cent. 
Duration of test, 10 hours. Kind of grate, plain. 
Test 149, Illinois No. 18, washed. 
Size as shipped, lump. Size as used, over 1 inch, 
21.7 per cent; \ inch to 1 inch, 22.7 per cent; \ inch 
to \ inch, 28.8 per cent; under \ inch, 26.8 per cent. 
Duration of test, 5.32 hours. Kind of grate, 
plain. 
MISCELLANEOUS ITEMS. 
Test 140. 
Test 147. 
Test 148. 
Test 149. 
Heating value of coal B. T. U. per pound dry coal.. 
12,951 
13, 554 
12,991 
13, 432 
Force of draft: 
Under stack damper inch water. . 
0.63 
0.57 
0. 53 
0.56 
Above fire do 
.18 
.17 
.19 
.14 
Furnace temperature °F. . 
2060 
Dry coal used per square foot of grate surface per hour, 
pounds 
18. 51 
19.53 
18.86 
17.83 
Equivalent water evaporated per square foot of water- 
heating surface per hour pounds. . 
2.86 
3. 12 
2.99 
3.29 
80. 1 
87.4 
83.9 
92 2 
Water apparently evaporated per pound of coal as fired, 
pounds 
6.51 
6.49 
6.13 
6.61 
Water evaporated from and at 212° F.: 
Per pound of coal as fired pounds. . 
7.60 
7.57 
7.06 
7.70 
Per pound of dry coal do 
8.61 
8.91 
7.94 
9.23 
Per pound of combustible do 
9.90 
9.86 
9.13 
10.08 
Efficiency of boiler, including grate per cent.. 
64.20 
63.48 
59.02 
66.36 
Coal as fired: 
Per indicated horsepower hour pounds. . 
3.72 
3.74 
4.01 
3. 67 
Per electrical horsepower hour do 
4.59 
4.61 
4.95 
4.53 
Dry coal: 
Per indicated horsepower hour do 
3.28 
3.17 
3.56 
3.06 
Per electrical horsepower hour do 
4.06 
3.92 
4.40 
3.78 
ANALYSES. 
Test 140. 
Test 147. 
Test 148. 
Test 149. 
Proximate. 
Moisture 
11.72 
37.27 
41. 73 
9.28 
14.99 
37.24 
42.00 
5.77 
11.10 
37.11 
42.14 
9.65 
16. 64 
Volatile matter 
36. 13 
Fixed carbon 
41. 51 
Ash 
5.72 
ISulphur 
100.00 
4.07 
100.00 
2.98 
100. 00 
3. 37 
100. 00 
2.72 
