CADY AND MCFARLAND.| Composition of Natural Gas. 243 
The methods by which the above analyses were made are de- 
seribed in the same report, pages 554 and 555. It is interesting 
to note that these analyses do not cover a very large field, and 
we would not be surprised if gases from other portions would 
differ markedly in composition. The only analysis of West 
Virginia gas which we have been able to make in the present 
series is one from Morgantown, W. Va., which was furnished 
to us under the direction of Dr. I. C. White, of the West Vir- 
ginia Geological Survey. The results of this analysis may be 
seen in table 27, on page 270, analysis No. 39. The agreement 
with Howard’s analysis, No. 1 in above table, is not bad. 
PENNSYLVANIA. 
Pennsylvania has long been noted as being the chief pro- 
ducer of natural gas in this country, and the attention of an- 
alysts was very early turned towards the discovery of the 
composition of Pennsylvania gas. The very earliest analyses 
of Pennsylvania gas were made by Fouqué, in the series al- 
ready referred to. (See p. 239.) The first official series of 
analyses was made by Samuel P. Sadtler, published in 1875.12" 
He used absorption methods for carbon dioxid, carbon monoxid, 
illuminating hydrocarbons and oxygen, and calculated the 
methane, ethane and hydrogen from the data obtained from ex- 
plosion. In the following table each result is the average of 
two analyses: 
TABLE No. 8. 
Burns Well, Leechburg, Harvey Well, Cherrytree 
Butler county, | Westmoreland | Butler county, | Spring, Indiana 
Pennsyl- county, Penn- Pennsyl- county, Penn- 
vania. sylvania. vania. sylvania. 
Canbonvdioxidens.....5.. 0.34 0 35 0.66 7), OAS 
Carbon monoxid......... trace 0.26 GRACO Mae mires s 
Olefins....... I rst sal (eens oki tsia OS Ole apts Vania Sewn be acess ay Seva. 
Py dnomeneepeee se. oa. 6.10 4.79 13.50 22.50 
WUGUIETTOS S655 6 eae 75.44 89.65 80.11 60 27 
thane ete Nol 4.39 5 12 6.80 
IPROVO Gos evens ee trace CAC Clase ee eeae fa anon s,s ec weecs 
ORB ooocce 00 0b Ae ORI Cree Ret al uA tA Aime steerer Ga Ite a 0.83 
INO CN NIE ener te ate es OS ee oe TB 
MG tAlSSa ics. c. 100 00 ~=6|~=6100.00 oS) tp TUCO) OY 
: Srecinc gravity of the Burns Well gas (calc.) 0.6148; (det.) 0.6977. Others were not deter- 
mined. 
As to the hydrogen in these analyses, see “General Discus- 
127. Second Geol. Sury. of Pa., vol. L, pp. 152-160, 1875. 
