' THE LOWER COAL MEASURES. 201 
—S FYGU RE KXLX 
STRUCTURE OF UPPER FREEPORT 
COAL (N¢6 OF NEWBERRY) OR BIG 
VEIN. AT SALINEVILLE 
Somdsbome—___--_---- 
Blu sh. Bic Shae ees 
Black Orne = Qh 
Goal main : a me 
Porting. 
Coal - iat 
Vow e- clay 4 
limestone____-_-_-_--- Lad 
It is free from the more troublesome form of “clinker.”? The railroad 
mines are now running lump and nut coal together. 
The nut coal is used to a small extent in rolling-mills, and some 
of the slack is coked at Salineville, but the quality of the coke fits it 
for heating purposes only. The coal is not largely used for domestic 
fuel. 
At several of the mines the slack is now washed, and a marketable 
article of pea coal is secured. ‘The rapidly developing economy in the 
use of all the products of the mine is to be regarded with great interest 
and favor. It does not come too soon. 
The composition of the coal is fairly well shown in the following 
analysis (Lord) of the coal of the Hussey Bank of the O. & P. Co.: 
