TESTS — NORTH DAKOTA. 
135 
It should be stated that the peat bricks had been dried and that the moisture content 
of those used averaged 21 per cent. The gas was particularly rich in hydrogen, running 
18.5 per cent, and comparatively low in nitrogen (45 5 per cent). 
As there was a small supply of peat bricks left after the completion of the gas-producer 
tests, a short run of a little over four hours was made in the boilers. This was not suffi- 
ciently long to make any definite conclusions possible, but the results obtained were exceed- 
ingly satisfactory so far as they went. No difficulty was encountered in keeping the boiler 
up to its rated capacity, and, in fact, during the four hours' run the percentage of rated 
horsepower of the boiler developed was 113.2. The amount of peat burned per indicated 
horsepower hour at the steam engine was 5.66 pounds, and per electrical horsepower hour 
at the switch board was 6.98 pounds. The calorific value of the peat as used was 10,082 
British thermal units per pound. The principal difficulty in the utilization of peat under 
boilers appears to be the frequency with which it is necessary to fire. On account of the 
lightness of the material and also on account of its rapid combustion the fireman was kept 
at work almost constantly during the test. 
NORTH DAKOTA NO. 1 B. 
Brown lignite from Lehigh mine, Consolidated Coal Company, Lehigh, Stark County 
N. Dak., on the Northern Pacific Railway. 
This sample consisted of run of mine, and was shipped under the supervision of M. R. 
Campbell, of the United States Geological Survey. Producer-gas test No. 68 was run en 
this sample. a 
Two mine samples (Nos. 1971 and 1972) were taken at widely separated points in the 
mine for chemical analysis. 
CHEMICAL ANALYSES. 
Laboratory number. 
Air-drying loss 
g [Moisture 
g I Volatile matter 
g J Fixed carbon 
£l|Ash 
[Sulphur 
Hydrogen 
Carbon 
Nitrogen 
Oxygen 
Calorific value determined: 
Calories 
tritish thermal units.. 
Mine samples. 
1971 
35. eo 
42. 06 
24. . r ,:, 
25.73 
7. 66 
1.13 i 
3,421 
6,158 
1972 
33. 90 
42.81 
26. 84 
23. 93 
6.42 
.96 
Car 
sample. 
2289 
10.40 
32. 64 
29. 19 
26. 75 
11.42 
3. 54 
(i. 15 
39. 53 
.49 
38.87 
3,872 
6,970 
For tests of sample furnished in 1904, see Bull. U. S. Geol. Survey No. 261, 1905, pp. 82, 162. 
