138 
OPERATIONS OF FUEL-TESTING PLANT IN 1905. 
NORTH DAKOTA NO. :J. 
Brown lignite from Wilton mine, Washburn Lignite Coal Company, 1 mile east of Wilton, 
McLean County, N. Dak., on the Minneapolis, St. Paul and Sault Ste. Marie Railway. 
This sample was made up of lump lignite and was shipped under the supervision of M. K. 
Campbell, of the United States Geological Survey. It was used in making steaming test 
No. 20G and producer-gas test No. 67. 
Mine samples Nos. 1935 and 1938 were taken at widely separated points in the mine for 
chemical analysis. 
CHEMICAL ANALYSES. 
Mini- samples. 
Car] 
sample. 
La 
\ i 
1935 
32.30 
40. 53 
27.05 
27.37 
5.05 
.76 
1938 
33.50 
41.88 
26. 1 1 
26. ?:: 
5. 28 
. 96 
2243 
12.70 

35. 9C 
- 

31. 92 
24. 37 
O 
u 
1 Ash 
7.75 
|Sulphur 
1.15 
c 
Hydrogen 
6.54 
- 
s 
J3 
Carbon 
41.43 
1.21 
p 
41.92 
Ca 
[orific value determined: 
Cain lies 
3,691 
6,644 
3, 927 
7,069 
STEAMING TEST. 
Test 306, North Dakota No. :{. 
Size as shipped, lump. Size as used, average diameter, three inches, 76.5 percent; \ inch tol inch, 
10.6 percent; | inch to j inch, 4.9 per cent; under j inch, 8 per cent. Duration of test, 5.72 hours. 
Kind of gate, rocking. 
\l I SI ELLA N E< >US ITEMS. 
Heating value of eoal B. T. U. per pound dry coal. 
Force of draft; 
Under stack damper inch water. 
Above fire do. .. 
Furnace temperature °F. 
I>r\ coal used per scmarc foot of grate surface per hour pounds. 
Equivalent water evaporated per square loot of water-heat ing surface per hour do... 
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 
11,036 
0.65 
a. 10 
2,093 
27.99 
3. 24 
90.7 
3. 52 
4.13 
6. 45 
7.47 
56. 44 
6.85 
8.46 
4.38 
5. 41 
a Forced draft . 
