182 GEOLOGY OF OHIO. 



vented this ridiculous waste of hundreds of dollars, but also would have 

 shown accurately, over a considerable extent of country, the horizon at 

 which the blackband might be sought. The shale here contains great 

 numbers of Aviculopecten rectilateraria, Cox, sp. 



Springs issuing from these shales are, for the most part, more or less 

 impregnated with iron, and where they empty into low grounds bog iron 

 ore is found in considerable quantity. In the vicinity of Harlem, Lee 

 township, the springs at this horizon are strongly chalybeate, and at one 

 time they were quite famous. On Mr. Samuel Dunlap's property is a 

 spring which was formerly celebrated as a curative for dysentery and 

 allied diseases. Many years ago a hotel was built in the glen near this 

 spring, and was largely patronized; but it has gone to ruin, and, strangely 

 enough, the spring is by no means so strongly chalybeate as before. Other 

 springs of like character occur on the farms of Mrs. Nancy Morehead and 

 Messrs. James Gott and John Hostermann. These never fail, and always 

 yield a large amount of water. It is quite possible that were there 

 ready means of access to Harlem, these springs might again acquire con- 

 siderable reputation, and so render the village, which is pleasantly situ- 

 ated, a summer resort for invalids. 



Coal No. 7 b, underlying these shales, is somewhat irregular in its habit, 

 but seems to thin out north-westwardly, and in the same direction to lie 

 nearer the limestone above. On the dividing ridge east from Carrollton 

 it is first seen two inches thick, and almost directly under the limestone. 

 Followed toward Harlem, Lee township, it is observed becoming four 

 inches, then one foot, continually increasing in thickness and separating 

 itself from the limestone, until at Harlem it is found twenty feet below 

 the upper layer of the limestone, and more than two feet thick. About 

 half a mile east from that village Mr. Samuel Dunlap has opened it with 

 a shaft sixty-four feet deep. The coal, as obtained by him, is a semi- 

 cannel, open-burning, easily mined, of low specific gravity, and contain- 

 ing no pyrites, except in thin films upon the vertical planes. It is very 

 handsome, but rather brittle. The layers of cannel and bituminous coal 

 are of about equal thickness, varying but little from one-tenth of an 

 inch. Near the top is a layer of cannel nearly four inches thick. The 

 roof is shale, and so firm that the rooms are worked fifty feet wide with 

 only a single row of props in the middle. The thickness of the coal is 

 twenty-six inches, and there are no partings. 



Mr. James Thompson, about half a mile north from Harlem, has opened 

 the same bed. It is twenty-six inches thick, with a not very persistent 

 clay parting near the middle. There is no layer of cannel on top, as at 

 Mr. Dunlap's opening, nor are the thin layers of cannel so numerous as 



