TESTS ILLINOIS. 
MISCELLANEOUS ITEMS. 
71 
Test 137. 
Test 138. 
Test 139. 
Test 141. 
Test 111. 
Test 112. 
Heating value of coal, B. T. U. per 
12,348 
12,159 
12,254 
1" .')()."! 
12,643 
12,775 
Force of draft: 
Under stack damper. . . .inch water. . 
0. 60 
0. 60 
0. 62 
0. 60 
0. 55 
0.48 
Above fire do 
.16 
.18 
.IS 
.15 
.28 
.27 
Furnace temperature °F . . 
2376 
19.94 
2435 
Dry coal used per square foot of grate 
surface per hour pounds. . 
20.98 
19. 70 
18.81 
24. 35 
22. 36 
Equivalent water evaporated per square 
foot of water-heating surface per 
hour pounds . . 
3. 17 
2.97 
3.06 
3.11 
2.93 
2. 90 
Percentage of rated horsepower of 
88.8 
83.4 
85.8 
87 3 
82 
Water apparently evaporated per pound 
of coal as fired pounds. . 
6.65 
6.59 
6. 86 
6.58 
5. 23 
5. 59 
Water evaporated from and at 212° F.: 
Per pound of coal as fired. . .pounds. . 
7.76 
7.68 
8.02 
7.66 
a 6. 15 
a 6. 59 
Per pound of dry coal do 
8.42 
8.32 
8.67 
8.29 
6.70 
7.23 
Per pound of combustible do 
10.19 
10.13 
10.42 
9.70 
8.21 
8.99 
Efficiency of boiler, including grate, per 
cent 
64.51 
66. 08 
68.33 
64. 02 
51. 18 
54. 65 
Coal as fired: 
Per indicated horsepower hour.. lbs.. 
3.64 
3.68 
3.53 
3.69 
4.60 
4.29 
Per electrical horsepower hour. ..do. . 
4.50 
4.55 
4. 35 
4.56 
5.68 
5.30 
Dry coal: 
Per indicated horsepower hour. . .do. . 
3.36 
3.40 
3.26 
3.41 
4.22 
3.91 
Per electrical horsepower hour. ..do.. 
4.14 
4.20 
4.03 
4.21 
5.21 
4.83 
Test 115. 
Test 116. 
Test 117. 
Test 118. 
Test 119. 
13,079 
Test 120. 
Heating value of coal, B. T. U. per 
pound dry coal 
12,321 
12,933 
12,537 
12,801 
13,370 
Force of draft: 
Under stack damper inch water. . 
0.61 
0.49 
0.50 
0.39 
0.57 
0.58 
Above fire do 
.26 
. 22 
.20 
.16 
.25 
.23 
Furnace temperature °F 
Dry coal used per square foot of grate 
surface per hour pounds. . 
22.89 
24.19 
23.80 
23. 16 
25.70 
25.41 
Equivalent water evaporated per square 
foot of water-heating surface per 
hour pounds. . 
3. 42 
3.61 
3.42 
3.32 
3.75 
3. 55 
Percentage of rated horsepower of 
boiler developed 
96.0 
101.3 
95.8 
93. 1 
105.0 
W. 5 
Water apparently evaporated per pound 
of coal as fired pounds.. 
5.82 
5.86 
5.73 
5.76 
5.81 
6. 03 
Water evaporated from and at 212° F.: 
Per pound of coal as fired. ..pounds. . 
a 6. 83 
a 6. 94 
a 6. 71 
a 6. 74 
a 6. 84 
« 7. 08 
Per pound of dry coal do 
7.49 
7.48 
7.19 
7.19 
7.31 
7.79 
Per pound of combustible do 
9.20 
8.79 
8.51 
8.46 
8.46 
8.74 
Efficiency of boiler, including grate, per 
cent 
58.71 
55. 85 
55. 38 
54. 26 
53.97 
56. 27 
Coal as fired: 
Per indicated horsepower hour . .lbs. . 
4.14 
4.07 
4.21 
4.19 
4.13 
3. 99 
Perelectrical horsepower hour... do.. 
5.11 
5.03 
5.20 
5.18 
5.10 
1.93 
Dry coal: 
Per indicated horsepower hour... do.. 
3.78 
3.78 
3.93 
3.94 
3.87 
3.63 
Per electrical horsepower hour. . . do. . 
4.66 
4.67 
4.85 
4.85 
4.78 
4.48 
a A better evaporation would have been obtained if boilers and gas-sampling apparatus had 
better condition, as they were later. 
been in 
