784 GEOLOGY OF OHIO. 
Coal of Dennison Mine—Lord—(Sampled by F. Keffer). 
MOistiare cee RS RSE ee Bs EE Re SE Oe eo RU a en en ee 5.03 
Volatile,combustilblenmattenteceeccacccaoce eee eee ee eae 40.21 
Pix? CALDOM sv cisaske cra se beceisaceweal acta owe ehee lat eee CN a ea Eee ny 48.35 
| 0 Ve eee aE ere) eke PANN WER AN AMA NAN APLAR Edie 3 ous Soodee osccoud 6.41 
Tc) i: 8 eee a te RYO ren Pm re hfe HOMCURD nol ORE TRE Re sdacScteob endode 100.00 
Sulphur. c.sceecesetevsttecvccaedacapeesseosctccut nll Mercer? ecan tee Seteemeey oar tanaa aera 3.07 
From these figures, it appears that the coal of this mine falls below 
the highest standard of the seam. The sulphur of the analysis is 
exceptionally heavy, and it is possible that there may have been some 
excess in the samples in this respect. The output of the mine is almost 
exclusively used as locomotive fuel. 
The Burnet Mine, operated by the Brewster Coal Company of 
Akron, has a lease on several hundred acres, 50 to 75 of which have 
been proved to be productive. There are probably 200 acres of coal in 
this basin. Coal was first shipped from this mine in 1882. It is now 
sending out 250 to 300 tons per day. Of the sections from the surface to 
the coal, of which 30 or more have been drilled, a fair average would 
show the order herewith given: 
DEL EG) cot ax daa ccttectowenvansesee sees elec ome cece ache eee cates 25—30 feet. | 
Bluish' Shale. iecce coeectescccs wenicaeee tee ees 10-15 “| 
GiayiGhale, 25 beeen Bee eee 25-80, iat yen oP 
Black chipislate ti... cs. nator: cisesesdecoseston cacncees 2-38 “| ? ; 
(Cy: CE SATE AR Sei EEE AN Re men edn Ate Hepa ers 45 =“ J 
Fire-clay or “gannister’’. 
Sandstone. 
The rider seam, coal No. 2, is cut in many drill-holes. It is 12 
inches thick, and 45 to 50 feet above the main seam. There is usually 
no rock above the rider. 
The roof is fairly regular and strong. The face of the coal runs 
N. 30° E. The seat of the coal is generally clay, but in places it isa 
very hard rock, like gannister, striking fire with the pick. The thick- 
ness of the coal probably averages 4% feet. Its limits, as worked, are 6 
and 3% feet. Powder is used in large quantity, viz., at the rate of 1 keg 
to 20 or 30 tons of coal. No undermining is done, and but little cutting, 
the whole work being done by the powder. One-fifth of the coal is 
estimated to go into slack, and one-tenth into nut coal, making 30 per 
cent. for the two. There is a good deal of ‘white cap” in the seam. 
This is popularly connected with a disposition to “run on the grate,” 
but it is not really responsible tor this bad characteristic. 
