THE CARBONIFEROUS SYSTEM. 
ANALYSES OF Coat No. 6. 
149 
No. 1. Arter farm, New Lisbon, Columbiana county. 
“¢ 2. Isaac Dike’s mine, Camp Run, Columbiana county. 
“« 3. Salineville, Big vein, Columbiana county. 
“<4. Linton, ‘4 TN eh 
Ay  Onidoorn Jeli a 
“6. Saunders’, Millersburg, Holmes county. 
“7. Andreas’ mine, Urichsville, Tuscarawas county. 
““ 8. Steubenville shaft coal, Steubenville, Jefferson county. 
“ 9. A. B. Hamilton, Waynesburg, Stark county. 
“10. Keith’s mine, Coshocton county. 
“11. Muskingum Valley Coal Company, Rock Run, Muskingum county. 
“12. New Straitsville, Perry county. 
‘13. Nelsonville, Athens county. 
SOO AG SAKENLINY cooaccoge Ho0d0OG00 1.260 1.276 1.280 1.276 1.280 1.369 
MUGIS GUNG ee tee cen eke cae ece 3.45 1.525 1.40 2.60 1.60 5.10 
Volatile combustible ......... 30.06 38.425 | 34.60 39.17 29.29 39.00 
TOES Cette OLOTN Gacoca.dodo00 eob0d0aee 56.36 57.925 | 59.55 55.80 64.50 51.70 
PNG INGR elaine danse cee acsastest veces 4.63 2.125 4.45 6.48 4.00 4.20 
100.00 | 100.00 | 100.00 | 100.00 | 100.00 100.00 
ull nian ewes ctcswcivachsticwers 2.50 122, Boll 2.63 2.80 2.26 
7 8. 9 10. ble 2? 113% 
Specific gravity ...... 1.244 1.305 1.273 1.3839 1.293 1.269 1.28 
Moisture 5.64 -.2eeee2 3.20 1.40 3.30 4.00 3.47 6.90 5.95 
Volatile combustible} 384.20 30.90 33.90 36.20 37.88 30.25 32.38 
¥ixed carbon ......... 58.00 65.90 60.00 54.70 53.30 58.19 57.12 
PANG MMe mee naynn se SiS cosas stds 4.60 1.80 3.40 5.10 5.35 4.66 4.55 
100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 
SOUT OLAS? cendooses soonoades 1.54 0.98 0.66 2.69 2.235 0.79 0.77 
THE MAHONING SANDSTONE. 
Coal No. 6 is immediately overlaid by a greater or less thickness of 
shale. 
This is sometimes argillaceous, with many impressions of coal 
plants; in other localities—as in Holmes county—it is black, bitumin- 
ous, and is crowded with fossil shells. 
Neither the plants nor shells, 
however, are peculiar to this seam, but are species widely distributed 
throughout the Coal Measures, both vertically and laterally. Occasion- 
