TESTS — PENNSYLVANIA. 
CHEMICAL ANALYSES. 
167 
Laboratory number. 
Air-drying loss 
& I Moisture 
1 1 Volatile matter. 
x ] Fixed carbon. .. 
S If Ash 
[Sulphur 
Hydrogen 
Carlton 
Nitrogen 4 . 
Oxygen 
Calorific value determined: 
Calories 
British thermal units 
Mine samples. 
1942 
1.60 
2.73 
30. 34 
57.80 
9.13 
1.33 
7,563 
13,613 
1943 
1.70 
2.80 
30.92 
58.21 
8.07 
.83 
Car 
imple. 
2187 
2. 20 
3. 15 
30.27 
56. 17 
10.41 
1.26 
4.96 
74.33 
1.43 
7.61 
7,448 
13, 406 
STEAMING TESTS. 
Test 207, Pennsvli 
a No. 4. 
Size as shipped, over ]\ inches. Size as used. 
over 1 inch, 30.4 per cent; \ inch to 1 inch, 21 per 
cent; 1 inch to \ inch, 16.4 per cent; under \ inch, 
37.5 percent. Duration of test, 10 hours. Kina 
of grate, rocking. 
cent; \ inch to \ inch, 16.9 percent; under \ inch, 
Test \M>!>, 
Vnnsylv 
inia No. 
4. 
31.7 percent. Duration of test, 10 hours. Kind 
of grate, rocking. 
Size as shipped, 
over 1 inch, 30.7 pe 
3ver \\ inches. Size as used, 
r cent; h inch to 1 inch, 22.7 
Test '208, Pennsylvania No. 4. 
per cent ; \ inch to 
\ inch, Iti 
7 per cent 
; under \ 
inch, 29.9 per cent. 
Duration 
of test, 10.05 hours. 
Size as shipped, over 1 ', inches. Size as used, 
over 1 inch, 25.8 per cent; \ inch to 1 inch, 20.3 per 
Kind of grate, rock 
"g- 
MISCELLANEOUS ITEMS. 
Test 207. 
Test 208. 
Test 209. 
Heating value of coal B. T. U. per pound dry coal.. 
13,979 
13,921 
13,952 
Force of draft: 
Under stack damper inch water. . 
0.44 
0.44 
0. 49 
Above fire do 
.14 
.13 
.15 
Furnace temperature °F. . 
2, 363 
2,223 
2,200 
i.Dry coal used per square foot of grate surface per hour pounds. . 
19. 61 
17. 45 
17.83 
Equivalent water evaporated per square foot of water-heatir.g sur- 
face per hour pounds. . 
3.41 
3. 08 
3. 07 
95.6 
86.2 
86. 
Water apparently evaporated per pound of coal as fired pounds.. 
8.10 
8.23 
8.02 
Water evaporated from and<at 212° F.: 
9.47 
9.62 
9.38 
Per pound of dry coal do 
9.70 
9.84 
9. 61 
Per pound of combustible do 
11.09 
11.36 
10. 98 
Efficiency of boiler, including grate per cent. . 
67. 01 
68. 26 
66. 52 
tCoal as fired: 
Per indicated horsepower hour pounds.. 
2.99 
2.94 
3.01 
Per electrical horsepower hour do 
3. 69 
3. 63 
3. 72 
3ry coal: 
Per indicated horsepower hour do 
2.92 
2.87 
2.94 
Per electrical horsepower hour do 
3. 60 
3. 55 
3.63 
