892 GEOLOGY OF OHIO. 
output being chiefly used for the locomotives of the railroad. These 
mines are located in Section 32. In Sections 20, 21, 29, 31 and 36, 
shipping banks have also been worked for a number of years. The 
‘mines of M. & P. Tague, in Section 20, are the largest in the township, 
after the Jones mine. All of the conditions noted above are repeated 
here. A successful business has long been maintained by this firm. In 
the winter season, seventy-five miners find employment here. 
In Sections 31 and 36, a considerable acreage has been exhausted 
of the lands lying nearest to the railroad, but a large body of coal 
remains that is easily available. ‘The mines located here are known as 
the Tunnel Hill mines. The structure of the seam agrees in all respects 
with that given for the McLuney mines, except that the bone coal in the 
roof rises to 16 inches in thickness. 
It is unnecessary to go into more details concerning this seam in 
Harrison township. There is a large and valuable supply of excellent 
coal, which offers a fair reward to properly managed mining enterprises, 
wherever transportation is possible. It is sure to be drawn upon in the 
near future, for in the work of mining coal, steadiness and persistency, 
with only moderate thickness, furnish in reality a better business basis 
than large but inconstant volume in the seam worked. | 
The Lower Kittanning coal, or No. 5, is everywhere due through- 
out the areas occupied by the upper seam, but there are only a few 
mines now open in it, and there is no reason for believing in any large 
development of it within the township limits. Its clay is present in 
valuable condition and quantity where the coal is wanting. In Section 
8, several mines in this seam have been worked for a number of years. 
The coal is, as usual, inconstant in thickness, ranging from 2% to 43 
feet. The quality is reported to be fair, but the product of the mines 
is insignificant. In Sections 4 and 9, the Lower Kittanning coal has 
been opened in years past, but it did not justify continuous working. In 
Section 25, a mine is in operation in this seam on the farm of C. 
Sweeny, the coal running much more regular and steady in this 
direction. 
The clay industry of Harrison township is very important, but this. 
has been treated in another chapter. There is also a considerable showing 
of ore throughout the township, but such trials as have been made do 
not warrant great expectations of value from this source. Most of it 
comes from the limestone horizons, and especially from the Upper or 
