STATE GEOLOGIST. 189 
county, where it is known as the Rhinard’s Mills pool. The principal 
part of the territory extends nearly north and south, and has a width 
ranging from one-quarter to one mile or more. Throughout much of the 
area the Little Muskingum river flows, its deep valley diminishing by two 
or three hundred feet the distance to be drilled. The pool is reported to 
have been first struck on the Beaver farm 7 or 8 years ago, though active 
work did not begin until 1897, when a 500-barrel well was secured on the 
Edwards tract in the southwest corner of section 4. The greater number 
of the wells, however, were drilled in 1899. The number of producers 
in August, 1900, was nearly 80. 
The oil is found in the Big Injun and Berea sands. With two or 
three exceptions the wells on the east side of the river are in the former, 
while more than half of those on the west side are in the Berea. ‘The 
Big Injun sand is reported to be from 65 to 70 feet ordinarily in thick- 
ness. The oil is found in the upper half of the rock, the pay streak 
ranging from 6 to 8 feet in thickness. Along the river in section 4 the 
Big Injun is found at a depth of 1,375 feet, and the Berea at 1,880. The 
drillers claim to recognize the ‘Keener sand, and report it separated from 
the “Big lime” above by a few feet of shale, and from the sandstone below 
by from 1 to 6 feet of the same material. Its thickness is given at 4o feet. 
The Berea commonly ranges from 5 to Io feet in thickness, but some- 
times disappears, its place being occupied by shales or shaley sandstone. 
When the wells are shot the first time the charge is small, usually about 
20 quarts, but as the wells are shot a second or third time the charge is 
larger. At first the oil flows, but the gas pressure soon falls so low that 
the wells require pumping. 
The Flint’s Mills Pool—This lies along the Little Muskingum river 
in sections 15, 16, 22, 21, 20 and 26. At first the work was largely con- 
fined to the valleys, but more recently it has extended over the hills. The 
length of the pool as developed in 1902 was 3 miles, and the greatest 
width one and one-quarter miles. As has already been stated, the Pitts- 
burg or Pomeroy coal is exposed in the valley at Flint’s Mills. 
The first well in the pool is reported to have been drilled on the 
McLain farm in June, 1898. It extends to the Berea, and began producing 
7 barrels daily, but two years later its production had decreased to one 
and one-half barrels. From that time work has been in progress; more 
than 100 wells having been drilled, of which approximately 90 per cent. 
were producers. The largest one thus far secured is on the C. & S. 
Graham farm, in section 20. It is reported to have started at 480 barrels, 
and to have produced 250 barrels per day for some time. Several months 
after completion it was still producing 150 barrels per day. This is one of 
the best wells yet drilled in southeastern Ohio. A well on the Elizabeth 
Smith farm, in section 21, drilled in December, 1899, and shot with 4o 
quarts of nitro-glycerine, started at from 8 to Io barrels, and maintained 
