184 GEOLOGY OF OHIO. 
served. in Fox township it is constant at from ten to fifteen feet below: 
the limestone, but is always very thin. 
Coal No. 7 a is found at from sixty-five to ninety feet below No.7b. It 
is traceable with extreme difficulty, partly because it is not persistent, 
and partly because of the varying intervals between it and No. 7 b, above, 
and No. 7, below. At several localities No. 7 is found at a horizon, rela-— 
tive to the Crinoidal limestone, precisely the same as that occupied by 
No. 7a at others, and in each case there can be no doubt respecting the 
identification of the coals. The relations of No. 7 and No. 6 to the Crin- 
oidal limestone are equally peculiar over a large portion of the county, 
the interval between the two coals varying from thirty-five to one hun- 
dred feet. These facts are certainly conclusive against any alleged par- 
allelism of coal beds over a large area. 
In south-western Perry, not far from Mastersville, No. 7a is seen on the 
farms of Messrs. Minnick, John Suary, and B. Borland, where it is about 
eighteen inches thick, overlaid by an equal thickness of very good plate 
ore, which is certainly deserving of careful investigation. Hrosion has 
removed the overlying deposits from a considerable area, so that the ore 
can be reached without much stripping. Specimens of this ore were 
obtained from Mr. Borland’s farm, but, unfortunately, have been mislaid 
or missent, and we are unable to present an analysis. About one mile 
north from Perrysville, in the same township, this coal has been experi- 
mentally opened by Mr. Othniel Baker. When examined, the opening 
was not sufficiently extended to give any definite idea respecting the 
value of the bed. It appears to be about four feet thick, parted midway 
by about six inches of clay. It is sixty-five feet below No. 76. Near 
Leesville, Orange township, it is seen, but is very thin, and is not worked. 
At Harlem, Lee township, this coal is opened on Mrs. Harris’s property, 
is twenty-two inches thick, and good for domestic use, but contains a 
notable percentage of sulphur. On the adjoining farm of Mr. James 
Thompson it is a bituminous coal, two feet thick, with a good deal of 
pyrites. Fourteen feet below it is a cannel seam, fifteen inches thick, 
which appears to be local, having been observed at no other place where 
No. 7 a is exposed. 
Coal No. 7 is or has been worked in Orange, Harrison, Center, and Fox 
townships. In Orange township the openings are numerous, and the 
bed is of much local importance. At Leesville Mr. J. C. Price works it 
by means of a shaft thirty-five feet deep. He finds it four feet thick, 
without regular partings, and of nearly the same quality throughout. 
Pyrites occurs in streaks at various intervals through the bed, but is 
more abundant at the bottom. Nodules are by no means rare, and fre- 
