834 



GEOLOGY OF OHIO. 



Nelsonville seam on Lost Run, from which the coal will show less 

 sulphur, no more, indeed, than at Straitsville. 



At Old Straitsville, at the original Maginnis bank, the Nelsonville 

 seam is eleven feet thick, divided as follows : 



IT. IN. 



Blue shale. 



Coal, upper bench 6 10 



Shale 4 



Coal, middle bench 1 8 



Shale 2 



Coal, lower bench 2 



A suite of samples was taken in 1869 for analysis. These were No. 1 

 and No. 2, from the lower bench ; No. 3 and No. 4, from the middle 

 bench ; Nos. 5, 6, and 7, from the upper bench. 



The average percentage of sulphur is 0.85, which is very small. The 

 average percentage of ash is 4.03. During the iirst year of the Survey, 

 the Maginnis bank was the only place in all this region where fresh, 

 firm specimens of the whole seam could be obtained. Although little 

 coal had ever been taken from this bank, it was, nevertheless, famous on 

 account of the thickness of the seam, and the seam- itself was often 

 called the Straitsville seam. At the beginning of the Survey, it was 

 popularly believed to be another seam than the one at Nelsonville. 



When the branch railroad was afterwards built from Logan to the 

 Sugar Run valley, the town of New Straitsville was laid out, and 

 extensive mines opened. Here the seam is as thick as at Old Straits- 

 ville, and similar in its structure, and in the quality of the coal. 

 Samples selected by Professor Wormley and myself Irom the mine of the 

 Straitsville Mining Company were analyzed. 



No. 1, lower bench ; No. 2, middle bench ; No. 3 and No. 4, from upper 

 bench. 



