888 GEOLOGY OF OHIO. 
A coal of this character cannot, of course, be put into market 
under present conditions. In mining, the bone coal is generally taken 
down in entries, but not in rooms. In all cases where the bone coal is 
taken down, the entries afford room for a four and a half-foot mule, and 
often they give fully 5 feet of headway. The general structure of the 
seam is shown in the appended diagram : 
PLEVURE EXXLK 
STRUCTURE OF MIDOLE KITTANNING COAL(K6) 
AT J. & F.SHEERHAN’S MINES CLAY BANK STA. 
BotietCoules Maur wee 
Foles Kees coke 
G 
Por bin aWes 2c tay ay SS oh tel alle, Sh 
Goal - sub pe Valve) Gun 
alrove botbou. 
UGE - clay- —----------- = 
The coal of the seam mines in blocks of only moderate size, but it 
‘bears handling fairly well, and yields no excess of slack or nut coal. 
The character of the coal agrees exactly with the better phases of 
the Coshocton and Zanesville coals. It ignites easily, burns with a long 
and abundant flame, cements slightly in the fire, and yields a purple or 
chocolate-colored ash, of which the amount is relatively small. It isa 
favorite domestic coal wherever it is introduced, but its special adapta- 
tion is to the production of steam. It is highly approved and quite 
largely used as locomotive fuel. Its general constitution can be seen 
from the following analysis made for the survey by Professor Lord. 
The coal came from the largest mine of the district, viz., that of S. & 
J. Jones, McLuney Station. The sampling was done by Mr. E. C. 
Downerd : 
Composition of Middle Kittanning Coal (No. 6), at McLuney’s. 
NT OLSEUTLLE cee ee IE CAN RRR UI ae RARE RU Ba a A SNE 5.95 
SEK HUKEY (Ooo OLDNEI AY OVE) TOMENAKEYS. G50d0060000000000000000000000000000000000 000060 oadandtiso0e 41.87 
Fixed carbon %...........s0ccescecoresoesescecerse 9195605060090000000 0000900008 4000000000 48.21 
7 AV 1 1 a EI a ENA meee Pr adinracianiic coosardesaticoapucosooded 3.97 
Mo tal £5. coe eee Fa eee So re BIST Ie cea IE RR 100.00 
