282 GEOLOGY OF OHIO. 



Road, in section 15, Mr. D. Brown's opening gives the following sec- 

 tion : * 



IT. IK. 



1. Coal 1 6 



2. Shale 8 



3. Coal 1 6 



4. Clay 8 



5. Coal 5 8 



This shows a greater development of the roof-coal than any other 

 opening. The lower division is, upper bench, twenty-nine inches, part- 

 ing, one inch; middle bench, three inches, parting one inch; lower 

 bench, thirty-six to forty-two inches. South of the National Road the 

 coal is worked by Messrs. Allen, Nicholson & Thompson. A heavy horse- 

 back, closely connected with a thick "clay vein" and ten yards wide, 

 crosses their openings. 



Of the following analyses Nos. 1, 2, 3, and 4 are of Coal No. 8, and No. 

 5 of Coal No. 11 ; 1, 2, and 3 are from roof, upper and bottom of Mr. Brown's 

 bank. No. 4 from Mr. R. Lyle's, and No. 5 from Captain Crawford's coal : 



No. I. No. 2. No. 3. No. 4. Ifo. 5. 



Specific gravity 1.338 1.300 1.281 1.358 1.348 



Moisture 1.00 0.90 1.10 1.20 1.10 



Ash 14.00 4.60 6.20 6.50 2.90 



Volatile combustible matter 31.00 34.10 34.30 31.60 32.50 



Fixed carbon 54.00 60.40 58.40 60.70 63.50 



Totals 100,00 100.00 100.00 100.00 100.00 



Sulphur 6.31 2.74 2.52 4.11 0.68 



Sulphur left in coke 1.37 1.51 1.51 0.54 



Sulphur forming of the coke 2.10 2.33 2.24 0.81 



Fixed gasper pound, in cubic feet.. 3.22 3.35 3.35 3.30 3.46 



Ash -- Gray. Gray. Gray. Gray. Yellow. 



Coke Compact. Compact. Compact. Compact. Pulv 



Iron ore has been found in some localities over Coal No. 13, and was 

 formerly taken out for use at the Martinsville furnace. 



On property belonging to Mrs. H. Harrison, section 28, there is found, 

 one hundred and twenty-five feet above Coal No. 8, a limestone which 

 seems to disintegrate readily on exposure, for at this elevation a similarly 

 disintegrated rock is found on nearly every farm in the vicinity. It has 

 a yellowish color, and can be taken out with a pick. Some persons have 

 employed it as a marl, and found it very beneficial. The following analy- 

 ses show it to be merely a disintegrated limestone, but they are obviously 

 made from samples in very different stages of weathering. No. 1 was 



