DETAILED REPORT OF TESTS. 
The following are the results of tests made on the various samples of coal received from 
May 1, 1905, to January 1, 1906, arranged alphabetically according to States and showing 
in succession under the head of each sample all tests made on that sample. 
CALIFORNIA NO. 1. 
Lignite from Tesla mine, San Francisco and San Joaquin Coal Company, Tesla, Alameda 
County, Cal. 
This sample consisted of run-of-mine lignite, and was shipped under the supervision of 
E. W. Parker, statistician, United States Geological Survey. It was used in making 
producer-gas tests Nos. 32, 33, and 34. 
Two mine samples (Nos. 1606 and 1607) were taken for chemical analysis at widely 
separated points in the mine. 
CHEMICAL ANALYSES. 
Laboratory number. 
Air-drying loss 
^ [Moisture 
g Volatile matter 
"« I Fixed carbon 
HljAsh 
([SulpUur 
■2 Hydrogen 
S- Carbon 
£ Nitrogen 
[Oxygen 
Calorific value determined: 
Calories 
British thermal units. 
Mine samples. 
1606 
1607 
4.60 
4.50 
17.59 
18.02 
41.09 
39.22 
23.29 
26.39 
18. 03 
16. 37 
2.89 
3.07 
Car 
sample. 
4,503 
8,105 
1680 
10.40 
18.51 
35. 33 
30. 67 
15.49 
3.05 
5.93 
47.34 
.66 
27.53 
4,726 
PRODUCER-GAS TESTS. 
Test 32, California No. 1. 
Duration of test, 42 hours. 
Average electrical horsepower 207. 4 
Average B. T. U. gas, per cubic foot 158. 3 
Total coal fired pounds. . 23,850 
Test 33, California No. 1. 
A mixture composed of one-half Tesla lignite and one-half "front-end" cinders from 
locomotives at San Francisco, furnished by the Southern Pacific Company, was fed into 
the gas producer under normal conditions, and the test continued for several hours, but it 
was found impossible to keep up a supply of gas that would operate the engine under 
ordinary load. The analyses of the lignite, cinders, and resulting gas are given below. 
Test 34, California No. 1. 
A mixture of two-thirds Tesla lignite and one-third "front-end" cinders, as in test 33, 
was used in this test. 
Duration of test, 24 hours. 
Average electrical horsepower 206. 2 
Average B. T. U. gas, per cubic foot 132 - 6 
Total mixture fired pounds. . 11, 850 
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