282 | GEOLOGY OF OHIO. 
Road, in section 15, Mr. D. Brown’s opening gives the following sec- 
tion : 
FT. IN 
WS "Oa. oh oo Be Se Se Se re ree eR pn ve 1 6 
Den ales 2S oys ks sie ect eye ete CRA ict SS antag SO ee RC 0 8 
aid OX oy: ape ree ena rane maa Sa at te LN a a a has iI 6 
Aytes Claly sails eee Se Be NSE cys eC L saa Sete ee espera epee 0 8 
Bl COB Gare saa Be IRE os aN ST ee ny ae ema 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 : 
INO} ils No. 2. No. 3. No. 4. No. 5. 
Specicsoravabypecee eset ee testes 1.338 1.300 1.281 1.358 1.348 
MOISCUTO occ see nc. leee ea ceieeieis 1.00 0.90 1.10 1.20 1.10 
NSH gece is he Ot Sean 14.00 4.60 6.20 6.50 2,90, 
Volatile combustible matter --..... 31.00 34.10 34.30 31.60 32.50 
Hixedecarnbomaeec mance e tases 54.00 60.40 58.40 60.70 63.50 
PROCDISINS oe. Pe ome oo aye ote 100.00 100.00 100.00 100.00 100.00 
Stillness See Mar eiienemenre werent 6.31 2.74 2.52 4.11 0.68 
Sulphurileftin’cokey- =e. 5co- =: sae 1.37 1.51 1.51 0.54 
Sulphur forming of the coke....... BAe 2.10 2.33 2.24 0.81 
Fixed gas per pound, in cubic feet.. 3.22 3.30 3.30 3.30 3.46 
NTS) 0c ee a ee es ies ey ER nnn Gate TN Gray. Gray. Gray. Yellow. 
Coley: seat eee We Saka ees ae Compact. Compact. Compact. Compact. Pulv 
Iron ore has been found in some localities over Coal No. 18, 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 
