COAL. 95 
Coal section at the Nottingham mine (PI. V, No. 11). 
Ft. in. 
Coal and bone 10 
Fire clay and shale 1 2 
Coal with thin partings 2 1 
Fire clay 11 
Coal... 2 11 
Bearing-in coal 3 
Coal 2 5 
10 7 
At the Ellsworth the average thickness of the lower division of 
the coal is about 6 feet. Two typical sections measured as follows: 
Coal sections at the Ellsworth Collieries (PI. V, Nos. 12 and 13) 
Ellsworth Ellsworth. 
No. 1. No. 2. 
Ft. hi. Ft. in. 
Bony coal 1 
Fire clay 1 1 3 
Bony coal 1 1 
Coal.. 3 1 2 11 
(Shale 1 f 
Bearing-in coalj Coal 1 1 \ 
Ishale 1 1 
Coal 2 4 2 5 
6 10 6 11 
QUALITY. 
In quality the Pittsburg bed in Washington County is fair for a 
bituminous coal. During the field work for this report a number of 
samples of the coal were taken and sent for analysis to the fuel-test- 
ing plant of the United States Geological Survey at St. Louis. Each 
one of these samples was obtained by cutting a section 2 inches thick 
from roof to floor across as much of the seam as is mined for ship- 
ment, all partings not included by the miner being thrown out. The 
sample was then thoroughly mixed and quartered to the bulk desired, 
sealed in an air-tight can, and mailed to the chemical laboratory at 
St. Louis. 
All analyses of the Pittsburg coal given here include only the lower 
division, or portion mined for shipment. The bearing-in coal is 
excluded, as it is generally thrown out in mining. 
