It will be well now to turn for a few moments to the gas obtained by
cracking the light petroleum oils by themselves. The Russian and
American petroleum differ so widely in composition that it was
necessary to see in what way the gases obtained from them differed;
and to do this, equal quantities of American naphtha and a Russian
naphtha were cracked, by passing through an iron tube filled with
coke, and in each case heated to a cherry red heat, the gases being
measured, and then analyzed, with the following results:
American. Russian.
No. of cubic feet per gallon... 72 104
---- ----
Hydrogen....................... 26.0 45.3
Methane........................ 41.6 22.3
Ethane......................... 12.5 13.9
Olefines....................... 14.1 11.6
Carbon monoxide................ 3.3 3.5
Carbon dioxide................. 1.7 2.3
Oxygen......................... 0.8 1.1
Nitrogen....................... Nil. Nil.
----- -----
100.
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