TESTS ILLINOIS. 
77 
CHEMICAL ANALYSES. 
Mine samples. 
Car sam- 
ple. 
hi 
Ai 
iboratory number 
5. 30 
L0.28 
32.04 
49.74 
7.94 
1.06 
1691 
5. 20 
(1. ID 
48.87 
8.12 
1.63 
1.786 
r-drving loss 
4 60 
o 
(Moisture 
8 31 
£ 
31 65 
Fixed carbon 
4') 56 
o 
f \ sh 
10 48 
1 55 
o 
Hydrogen 
5 18 
Ca rbon 
i,:, 83 
Nit rogen 
1.48 
^ 
Oxvcpn 
15. 48 
Calorific value determined : 
Calories 
6,661 
1 1 , 990 
6 515 
British thermal units 
11,727 
STEAMING TESTS. 
Test 132, Illinois No. 13. 
Size as shipped, H inch to 6 inch, egg. Size as 
used, over l'inch, 31.0 per cent; £ inch to 1 inch, 
22.6 per cent; \ inch to \ inch, 15.0 per cent; under 
\ inch, 31.4 per cent. Duration of test, 9.98 hours. 
Kind of grate, rocking. 
Test 134, Illinois No. 13. 
Size as shipped, \\ inch to 6 inch, egg. Size as 
used, over 1 inch, 23.8 per cent; J inch to 1 inch, 
23.8 per cent; \ inch to \ inch. 20.8 per cent; under 
\ inch, 31.6 per cent. Duration of test, 10.02 hours. 
Kind of grate, rocking. 
Test 144, Illinois No. 13, washed. 
Size as shipped, \\ inch to 6 inch, egg. Size as 
used, over 1 inch, 30.0 per cent; \ inch to 1 inch, 
27.2 per cent; \ inch to h. inch, 19.0 per cent; under 
\ inch, 23.8 per cent. Duration of test, 8.95 hours. 
Kind of grate, plain. 
Test 145, Illinois No. 13, washed. 
Size as shipped, \\ inch to 6 inch, egg. Size as 
used, over 1 inch, 25.2 per cent; \ inch to 1 inch, 
18.7 percent; \ inch to \ inch, 20.1 per cent; under 
\ inch. 3«i.O per cent. Duration of test, 7.63 hours. 
Kind of grate, rocking. 
MISCELLANEOUS [TEMS. 
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-heat- 
ing surface per hour pounds . . 
Percentage of rated horsepower of boiler developed 
Water apparently evaporated per pound of coal as fired, 
pounds 
\\'at<r evaporated from and at 212° F.: 
Per pound of coal as fired pounds.. 
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 
