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gether with a fuller description of the facts obtained, will be published in
the District report.

It is due Mr. Hale to state that the Dennis record is, without doubt, the
longest detailed and accurately measured record of any oil well in the
United States. Deeper wells have been drilled, but no record has ever
been kept so accurate as this one to such a depth. Wherever the rock
passed through by the drill was found to change a specimen was secured;
in many cases a number of specimens of the same stratum were kept, in
order that after a more careful study the horizons or divisions might be
shifted the better to agree with the true succession of the strata.

I hope to deposit a duplicate series of specimens in the museum of the
Philadelphia Academy of Natural Sciences, and it is hoped that duplicates
may be deposited in other museums throughout the States. In view of this
fact, I have given below the numbers of the specimens obtained of each
stratum. The elevation of the top of the well above Ocean in feet is 2055.
The elevation of the Bradford Station of the Bradford Branch of the Erie
Railway being 1444 feet

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S. S. olive gray, soft, micaceous, some slate; specs. 43, 44, 45. 39

Red rock, mottled sandy shale, brown, green and gray; specs.
46, 47....

15 " 382

8" 390

10" 400

S. S. gray, very fine, hard, drillings like flour; specs. 51-56

inclusive...

Slate, sandy micaceous; specs. 57 to 63 inclusive..

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S. S. dark-gray, very fine, micaceous, flaky; spec. 64...

S. S. bluish-gray, fine, hard, remnants of fossils; spec. 65.....

Slate, sandy in streaks, micaceous, fossil bands; specs. 66-76 in-
clusive...

Dark-gray, thin-bedded S.S., fine, micaceous, slate partings, fos-
sils; specs. 77 to 89 inclusive.....

S. S. gray, fine, flaky, micaceous, fossils; specs. 90, 91, 92..

Slate; specs. 93, 94....

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S. S. fine, micaceous, alternating with slate and " chocolate"
shale, fossils; specs. 104 to 113 inclusive... . . .

...

125 "

943

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S. S. dark-gray, fine, close, hard; specs. 230, 231..

S. S. brownish-gray, fine, slate partings; specs. 232 to 237 in-
clusive.....

......

Sand, shells and slate; specs. 238 to 242 inclusive.
Slate, sand shell at 1428'; specs. 243 to 254 inclusive.
Fine sand shells and slate alternating; specs. 255 to 261 inclu-
sive...

Slate, sand shells at 1510', 1531', and 1573'; specs. 262 to 286 in-
clusive .....

Slate, with sand shells; specs. 287 to 291 inclusive.

Slate; specs. 292 to 295 inclusive ...

S. S. brown, fine, flaky. Bradford

specs. 296 to 310 inclusive....

Slate and S, S.; spec. 311...........

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.118 1605
27 1632
32" 1664

3d" or oil producing sand;

54 1718

1" 1719

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Salt water found in sands at..

..1745' and 1768'

Mr. Blakeslee reports that no "good show" of oil was found. A small
gas vein was struck, position not stated. Elevation of the bottom of the
Olean Conglomerate on the P. & E. R. R. four miles due south-west from
the Kinzua Well is 1868 feet. The calculated elevation of the same hori-
zon at the well is 1900 feet.

Wilcox Well, No. 2, or Schultz Gas Well.

Owned by M. M. Schultz & Co., situated on the west branch Clarion

River, in warrant 2676, Sergeant Township, McKean County, and five

miles north of Wilcox, a station on the Philadelphia and Erie Railroad,

104 miles east of the City of Erie. This well is 855 feet south, 17 degrees

30 minutes west, of Wilcox Well, No. 1, or the old Adams Well, which

was drilled in 1864. (?)

Drilling on this well was commenced about the first of the year (1876)

and completed in the latter part of August of the same year. After the

drilling was completed to a depth of 2004 feet, an "oil saver" was attached

to the iron casing (5ğ inch), and the gas issuing from the well was conveyed

through a two inch pipe and discharged about two feet above the surface of

the water, which partially filled the 250 barrel tank which had been erected.

Sufficient oil was passed to show itself as a scum on the surface of the

water.

Mr. Schultz conceived the idea of inserting into the well to a depth of

2000 feet, an inch pipe, and by closing the mouth of the casing to utilize
the pressure of the gas to force the oil out through the inch tubing.

Mr. Schultz believed that the bulk of the oil which was found in the
well was coming from the sand extending from 1795 to 1815 feet, in which
the drillers reported that they had "struck" a small quantity of heavy
green oil. In this event the immense volume of gas which was issuing
from a depth of 1776 feet might more than counterbalance in its pressure
the pressure of the oil from a lower horizon, and thus prevent it from fill-
ing the hole.

After the tubing was adjusted and the gas confined in the well as much

* For a complete record of this well, see a paper by Prof. Lesley in the Proceed-
ings of the American Philosophical Society, Vol. X, page 238; also one in the
Petroleum Monthly of a later date. A description of a very interesting action
of this well is given in a paper named "Description of the Wilcox Spouting
Water Well," which I read before the Society, Sept. 21, 1877.

as two to three barrels were forced out. Mr. Schultz thinks that the tubing during this time must have been entirely filled with oil to the exclusion of gas. In this case the pressure of the gas must have been sufficient to raise a column of oil one square inch in section and 2000 feet high. Of course, such an enormous pressure could only be temporary. The oil flowed from the tubing but for a few moments, the gas then probably became thoroughly mixed up with the oil which from its low temperature quickly congealed and effectually choked the pipe. After a few hours the gas ceased to flow entirely from the well and also from the adjoining well, No. 1. The gas commenced to flow again with greater energy after 36 hours of inactivity, from both wells, Nos. 1 and 2.

In the early part of 1877, the pressure of the gas seemed to increase suddenly. About the middle of May, four months after, the gas from both wells, Nos. 1 and 2, ceased to flow for the second time without any obstruction having been knowingly placed in its way. No gas was found to come from either well till July 14th, when it commenced to flow again. Up to the present time the amount of gas increases and diminishes at irregular intervals. The gas from this well was used as fuel in drilling well, No. 3. The elevation of Wilcox Well, No. 2, is 1642 feet above Ocean on the corrected datum of the P. & E. R. R. which makes Wilcox Station 1527.* Loam and gravel....

Gray slate..

30 to

30 50" 80

Gray slate..

Gray sand..

Red shale.

Gray sand..

Red shale..

Gray soapstone (shale and clay).

Red shale mixed with gray slate...

Streak of soft red shale.....

Gray slate....

White sand pebble rock containing gas and salt water.

Gray slate..

Dark gray slate..

Gray slate and sand...

Gray and red slate mixed...

Gray slate.....

Gray slate and hard shell..

Gray slate......

Gray and red slate..

Gray slate.....

Red and gray slate.

Gray slate..

Gray sand....

Gray and red sand..........

* Report N. Second Geological Survey of Pennsylvania, p. 142.

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