930 ; GEOLOGY OF OHIO. 
for his labor, to use his time in splitting out this thin band, and accord- 
ingly the lower slate, or the top of the lower bench of coal, is made 
the line of division. Counting in the second or middle slate, the whole 
thickness of what is here rejected ranges from 2 to 25 feet. In the 
accompanying diagram, Fig. XCa, the structure of the seam, as it was 
understood in 1880, is shown on one side, and on the other, the 
structure as it is found in 1883-4. Less than half of the coal, where it 
reaches its greatest thickness, is found to be first-class fuel, and to 
gain this amount the coal must be twice split. 
z ELGURE XOau 
GREAT VEIN’ COAL OF UPPER SUNDAY GREEK VALLEY. 
ZAS COUNTED BEFORE MINING WAS GOMMENCED- 
2AS FOUND IN PRARTIBAL Wi CRiane: 
Ges eo. ue 
] 80Roof Coal, cejecbeds 
Gos ov Rides 20° fF | 
Ross em rae fe G oal,\ppeo Bench. 
Upper Slate -———~ 4 == pret Gool,rejected, 
Coal, Uppes Bench 657 : 2 Coal,UppeeBeucly 
ih “Soft Bone 
Second Slate 2" | ne 
eT | aera Rejecked. 
liower Slate ____ #0 
Coed, Lower Bench 30° : 
Fice-clay UR Atri 
“4 Cool, WiddleBeach 
0Coal, Lower Bencl 
AW 
WMO \ SY 
A worked room of the mine presents a sorry spectacle, with its 
great ranks of rejected coal, much of which no one would dare to con- 
demn from its appearance alone, and all of which is in reality better 
than some of the coals upon which large communities depend. 
The Sunday Creek mines are now made to yield about 6,000 tons 
to the acre, which does not vary much from two-sevenths of the entire 
coal, where the seam reaches a thickness of 12 feet. 
The reductions that are made on account of inferior quality result, 
