STRATIGRAPHICAL ORDER. | 719 
at 370 to 380 feet above Lake Erie. A boring lately made here shows 
the Lower Freeport coal in good development from 50 to 60 feet below 
the Upper coal. The thickness of the seam, according to the affidavits 
of the drillers, was 5 ft. 2 in. 
The coal mined at Bowerston can be followed to the westward. It 
runs under the divide of Tunnel No. 10, on the P., C. and St. L. Rail- 
way, soon after the station is left, but it emerges promptly on the 
western side of the tunnel near mile post 86. It has been mined here 
on the Bell farm, 15 feet below the railroad, where numerous openings 
are shown. On Jacob Wyandt’s farm, the coal has been largely worked 
22 feet below the railroad. The seam is here fully 4 feet thick and of 
the usual quality. It is also worked for shipment on a small scale at 
Reed’s bank, still further west. At Clark’s farm the Lower Freeport 
coal has been worked. It lies 54 feet below the Upper seam, and is 
said to be 3 feet thick, but no entries are now open. The Upper coal 
is worked on the Patterson tract still further west, and also at the 
Stoner bank, where it has risen to 43 feet above the railroad. The last 
point where it is mined in this field is at the Wesley Foster bank, 1 mile 
west of Philadelphia Road. It is here about 60 feet above the 
railroad. 
Two miles further west the Dennison coal is reached as it first rises 
from above the railroad grade. Its elevation above Lake Erie is here 
275 ft., while the Upper Freeport coal at the Foster bank cannot be 
less than 340 feet above Lake Erie. This point is about 6 miles west 
and 2 miles south of Bowerston. 
The Dennison coal is without doubt the Middle Kittanning or Pike 
Run seam, and thus the line of sections now followed is seen to furnish 
a new demonstration of the order of the coal measures, so far as the 
Freeport and Kittanning horizons are concerned. The conclusions 
reached from these observations are identical with those already estab- 
lished in other parts of the field, but nowhere does the true order come 
out in clearer light. The leading facts may be thus recapitulated : 
The Dennison coal (Middle Kittanning) falls below railroad grade 
just east of Dennison. One and a half miles to the eastward, the Upper 
Freeport coal is found 60 feet above railroad grade at that point, or 
about 100 feet, dip being included, above the Dennison coal. The seam 
ean be followed from this first opening by a constant succession of mines 
to Bowerston and Leesburg. Throughout this territory it has been 
