Sailtler.j oSo [March 2, 



U. K. ill Warren County. This well had yielded only a trifling amount 

 of oil hut from it came a terrific outhurst of gas. The geological horizon 

 was totally different from that of the gas- wells in Butler County, being at 

 least GOO feet lower. The gas had been used for some time to light the 

 town of Sheffield and the tanneries there, being conveyed in pipes some 

 two miles for that purpose. 



;?. From a Well some five miles from Wilcox Station on the Philadelphia 

 and Erie R. R. in McKean County. Two wells had been sunk in this 

 neighborhood for oil and both had yielded gas only. The geological hori- 

 zon here is again different being some 400 or (500 feet lower than that of 

 the Shelfleld Well. The gas is not utilized at present. 



4. From one of the gas wells at Erie, Pa. Quite a number of wells have 

 been sunk at different times in the city of Erie, and the gas obtained has 

 been utilized as fuel in the manufactories there. The specimen taken was 

 from a well sunk by Oliver Bacon & Co., and the gas was used by them 

 as fuel lor their flour mills. This gas is again from a distinct geological 

 horizon. 



5. A specimen taken from the old well at Fredonia, N. Y., which has 

 supplied the town of Fredonia for a number of years with a natural illumi- 

 nating gas, was taken for analysis and comparison with those from tlie 

 Pennsylvania localities. This gas is from a depth of 100 feet only. 



6. A specimen was also taken from a new Well at Fredonia, which is 

 now used for purposes of illumination. This gas comes from a depth of 

 1200 feet. 



These gases were all collected, as in the previous cases, in glass tubes 

 which were sealed before the mouth blow-pipe, while a current of the gaa 

 was still passing through them. 



I will present with these new analyses those of the other gases pub- 

 lished in my former paper. This is chiefly for the purpose of comparison. 

 For this same reason I have classified the gases in several groups according 

 to their geographical location. 



I. Gases from the Lomer Oil Fields. 



1. Burns Well in Butler County. Collected in November, 1875. 



2. Harvey Well in Butler County. Collected in November, 1875. 



3. Gas from the same Well. Collected in August, 1876. 



4. Rogers Well in Westmoreland County. Collected in November, 1875. 



1. 2. 



Carbonic Acid (CO.,) 34 .66 



Carbonous O.xide (CO) trace trace 



Ethylene series (C.^IIj 



Hydrogen (H) 6.10 13.50 



Marsh gas (CH.) 75.44 80.11 



Ethyl-hydride (C.,HJ 18.12 5.72 



Propyl-hydride (C^illg) trace trace 



Oxygen (O) 



Nitrogen (N) 



100.00 99.99 



