THE LOWER COAL MEASURES. 237 
sional sulphur balls in the upper bench. The composition of the seam 
is shown in the following analysis: 
Chestnut Grove coal, North Industry ..................scsecssescceerevessevees Lord 
VIO ISELIN O ere eee ee ee ee eee ere coe ear e eg eee beanc coos tiie deoncceersecaes 4,82 
WG) VATE SRNR eT espe ocak cor ec Aeon b CEE RA GCE CES DORR SEECne CASE R CE Ean En neers ee 40.68 
PEST CLES SA TED COTM es Are ara Tse cle SrercTalG/Sce oselatS iets Sle wiererslaleicle istaaisione Saw create pe 49.78 
FANGS Lerner eter act nevatatnctcr HY aeicTcrarsia eras elaletelane'swislereiels alee caweeie rials tease nardeey oMitede Mabey 4.72 
OGY THe se onsdo ceo sBCOCEC CSOSA CEO HE CT ORCS SC oA Hae Anan Ie Me Rrra 100 
PSU OY WIP 556600000000000008 460000000099000000060008003 05000 Palace deta atigeess ox cect 2.04 
This result is in keeping with the other analyses of this seam in 
the vicinity, and shows a coal of good character. 
There are a few feet of shale always, and often 30 or 40 feet, over 
the coal. Large nodules of fossiliferous limestone sometimes are found 
next to the coal. The same thing often occurs in connection with this 
seam in Tuscarawas county. The shale makes a fair roof, but slakes in 
the entries when they are traversed by a full current of air. 
The floor of the coal is a heavy bed of soft, plastic clay, which, by 
the action of the air, swells and throws the track, and otherwise causes 
some trouble. 
Two miles below North Industry another small mine is found in 
the same seam. It is commonly known as the St. John mine, but it is 
now operated by the Harry Pocock Mining Company. The coal is 3 
feet thick, and has a single parting, but the division comes higher in 
the seam than in the mine last described, being only about 14 inches 
below the top. 
FLEURE Xk 
STRUCTURE OF MIDDLE KITTANNING 
COAL (N86).AT THE POSOCK aon) 
MINE-, PIKE TOWNSHIP. 
Bow had. Sulphwee Qus_ ___ 
(OAM) a a ee 
Sulplewe_bomd. —— dope sala ad eerie ee 
ON 2 PON eer ea TE 
