918 | GEOLOGY OF OHIO. 
Valley. lt i3 not largely worked even for neighborhood use in Clinton 
_ township, nor in Vinton and Bloomfield townships, Jackson county, be- 
cause of the fact that the next seam above it, No. Via, is a heavier and ° 
better seam in this district. 
In Madison and Jefferson townships, Jackson county, and in adjacent 
townships of Gallia county, the coal remains thin, seldom at least meas- 
ureing three feet, but its quality is almost always good and is often ex- 
cellent. This is the seam worked at Washington Furnace for smelting 
purposes. It is here but twenty-six inches thick, but, its quality is 
good and it is giving satisfactory results in the furnace. It is charred 
before use. In Walnut township, Gallia county, it makes the Lower 
Waterloo coal, a seam which yields over five feet of as good coal a3 is 
mined from this great horizon at any point in Ohio. 
Through the central part of Lawrence county, Coal No. VI is less con- 
spicuous than coal No. V, though its place is generally shown and the 
seam frequently becomes workable, but in Perry township again, and in 
the region south of the Ohio River, it shows a thickness of four to five 
feet and yields a great deal of excellent coal. Asthe Coalton or Ashland 
Coal, it has a high reputation, being used in iron manufacture to a con- 
siderable extent. The Perry township coal is called the Sheridan seam, 
and this name holds, as has been already stated, as far north as Jackson 
county. It may be remarked in passing that there is not the slichtess 
uncertainty in regard to the equivalence of the Sheridan and Coalton » 
Coals. No opposite sides of a river agree more perfectly than the Sheri- 
dan and Ashland sections. The sections indeed are identical. 
10. The next seam to ba met, Coal No. Via, has never yet received the 
attention that it really deserves. It has been confounded generally either 
with No. VI,or with No. VIb. Its position is about half way between these 
two coals. In the Hocking Valley, the usual measure is twenty-eight to 
thirty feet above Coal No. VI. This measure is maintained with surpris- 
ing steadiness through Vinton and Jackson counties. Thus, on the 
Cawthorn tract, Monday Creck, the interval is twenty-eight feet. It is ° 
the same on the Whitmore farm, just beyond’ Akron Furnace, and also on 
J. L. Gills land, on Meeker Run, west of the Hocking River. On the 
Ogan Hill, in Elk township, Vinton county, it is thirty-three feet. At 
Eagle Furnace, it is twenty-seven feet ; at [{lamden Furnace, thirty feet; 
at Iron Valley, the same, and also at Buckeye Furnace, and twenty-eight 
feet at Keystone Furnace and at Hartley’s Mills, Wilkesville township, 
Vinton county, where it is known as the seven feet seam. It will be re- 
membered that Coal No. VI is increasing its distance from the Gray Lime- 
tone slowly, but steadily, throughout this last Hamed region; but the 
