Doe, ANNUAL REPORT 
combination of these circumstances the products desired have been con- 
spicuous either by their absence or are present in such small quantities as 
to be of little value commercially. 
On the Waller farm near Cambridge 7 shallow wells were 
drilled, which produced a small amount of oil, but were abandoned. 
The oil is said to have been of such a nature that the Standard 
Oil Company would not handle it. The Cambridge Light and 
Fuel Company has 3 producing gas wells in Cambridge township. These 
were drilled several years ago, prior to 1892. The rock pressure at present 
(1900) is reported to be 400 pounds, but the production of the wells about 
100,000 cubic feet only per day. There is considerable trouble from salt- 
water and it is estimated that when the pressure drops to 200 pounds the 
wells will have to be abandoned. A small oil well was secured in the Berea 
sand on the Black farm, West Cambridge, in 1899. The sand was struck 
at 1,098 feet below the surface, and the gas pressure was sufficient to flow 
the oil. Such discoveries as this simply lead the operator to make further 
and further tests with the hope of securing a valuable pool. 
While expectations have not been met around Cambridge, a valuable 
reservoir of gas has been found 4 miles south of that city in Jackson town- 
ship. This is known as the Harmony field. It was opened in 1892 by the 
Pebble Rock Oil and Gas Company, the first well having been drilled on 
land of Margaret Murray. The well was closed until 1893, when it, to- 
gether with all the leases held by the same company were bought by the 
Cambridge Light and Fuel Company. The latter now has 6 producing 
wells in the field. Later the United Gas Company extended the territory 
and now (September, 1900) has 8 producing wells. The Campbell and 
Buckett Oil and Gas Company has 4 wells in the field, the product of 
which is piped to Byesville where it is used as a fuel by the Art Glass 
works. Doubtless other wells will be drilled and the production of the 
field correspondingly increased. 
The Harmony reservoir lies on a low dome shaped uplift. This is 
made plain by the Cambridge or No. 7 coal which rises above drainage in 
the central part of the territory, but dips away in all directions from this. 
It was the existence of this dome which led to the drilling of the first well, 
and thus to the discovery of the reservoir. The gas sand is the Berea, 
and lies from 1,080-85 feet below the Cambridge coal. It is not a contin- 
uous bed of sandstone, but is separated by a few feet of slate as follows: 
Feet. 
Sandstone 22 GLAS) ss essa ec) sicie es eats ene eee ios icedeae eae evenaers 40 
Saber esi Gee ee Sly a ol Sake Sa aT cee atiaih ace aa Vag cea ear 4 
DATLOSEOM Ce eee eae a es eae LO ta ne anne Giemsa gn ene ea au putes 20 
The gas is found above the slate. At the junction of the gas sand 
and the slate water is encountered, and so the former is rarely drilled 
through. Occasionally a little oil and gas are found in the sand below the 
slate, but none of the wells in the Harmony field derive their supplies from 
