246 University Geological Survey of Kansas. 
on page 675 of the Pennsylvania report cited above, Doctor 
Chance expresses doubt as to the presence of any free hydro- 
gen in the gases. He states that if the percentages of methane, 
ethane and hydrogen shown are added together and the results 
recalculated all variation in fuel value disappears. With re- 
spect to the subject of variation of composition of the gas 
from the same well, the work of Phillips!*° is of interest. Mr. 
Phillips determined the nitrogen content of the gas from a 
number of wells, and found that it varied somewhat from 
time to time. He did not test the gas for its other constituents. 
More reference will be made to this work later in this paper. 
(See “General Discussion,” section IV, p. 280.) 
What appears to be the most careful work that has been done 
on any gas analysis in America is that by Frances C. Phillips 
for the Pennsylvania Geological Survey during the year 1887, 
and published in the annual report of the Survey for 1886.1°° 
This report was published in the latter part of 1887. One of 
these analyses, that of the Murrysville gas, has already been 
given above in table 9. The others are given in the following 
table (No. 12). 
Analyses Nos. 8, 9, 10, 11 and 13 are taken from a paper by 
Phillips.1°7 
Phillips states (loc. cit.) that careful tests, including in 
some cases the passage of gas through solutions for weeks, 
have failed to show the presence of carbon monoxid or olefins 
in any of the gases examined. Oxygen seemed to be present in 
all samples but in quantities too small to be determined. Free 
hydrogen was reported only in the Speechly gas, where in the 
first report of the analysis 0.02 per cent. was given. In later 
reports of this same analysis he omitted the hydrogen, and in 
a paper!®’ he says: ‘“‘In many tests of gas made at the wells, 
and at intervals during several years in western Pennsylvania, 
I have failed to detect even traces of free hydrogen.” 
OHIO. 
A number of reports on the occurrence of oil and natural gas 
in the state of Ohio have been published by the Ohio Geological 
Survey and by the United States Geological Survey. 
135. Proc. Am. Acad., 34, 71-80 (1898). 
1386. Ann. Report Pa. Geol. Surv. for 1886, pt. 2, pp. 787-827. 
1387. Am. Chem. Jour. 16, 416. 
188. Proc. Eng. Soc. of W. Pa., 138, p. 454 (1897). 
