SUPPLEMENTAL REPORT—-HANGING ROCK DISTRICT. 921 
Measures it hasbeen opened at many points for local use, on account of 
the scarcity of coal at this horizon. 
15. The seam next to be named is the most valuable of the Appala- 
chian coal field, viz.,the Pittsburgh Coal, or No. VIII of Newbarry’s classifi- 
cation. It lies atthe base of the upper productive Coal Measures, and 
only reaches this district in isolated oitliers. Its position is about four 
hundred and forty feet above Coal No. VI, though the maxmium intervals 
measured give over five hundred feet. No discussion of the seam is in 
place at this time. | 
The formal enumeration of the extendad coal seams of the district has 
now been completed. The number given is large, but it is in no wise in 
excess of the facts. Several additions could be made, indeed, of seams 
that have a considerable distribution, but none has been discussed here 
that can not be traced through more than a single county. 
It will be seen that there are many poiats in regard t» which uncer- 
tainty prevails. Attention is called to them in order that the facts 
may be noted by these who have the opportunity. It is only by connec- 
ting the several subdivisions of the fi-ld, on the basis of a minute and 
individual knowledge of each one that is possible to none but actual 
residents, that the facts can be combined in the truth of nature. 
a 
D. GENERAL SECTION. 
A general section to which reference has already been repeatedly made, 
is here introduced, showing the order of succession of all the elements 
thus far described. It will beseen that the absolute elevations above the 
Jackson Shaft Coal are generally put at a higher figure here than in the 
‘preceding diagrams. This arises from the fact thal maximum intorvals 
must he used in the general section in order to find the proper room for 
all the elements. No interval between conspicuous horizons, however, is. 
introduced that is not guaranteed by some ) Bown and a measured 
section. 
The interval between the Gray Limestone and Coal No. VI is put in the 
diagram at sixty-five feet. This isa true measure for a wide scope of 
country, viz, Southern Jackson, Gallia, and Lawrence counties, but_ 
from the middle of Jackson county northward but little more than half 
of it 1s required. | 
By an oversight in reading proof, the elevation of Bayley’s Run Coal 
(No. VIL) is given as five hundred and ten feet, where it was designed to 
read five hundred and twenty feet. 
The elevation given to the Iron Point Ore is the maximum elevation 
above CoalNo. VI. Asarule, the ore and Coal No. VII lies nearer each 
other than the measures here given would imply. 
