THE SILENT ELECTRIC DISCHARGE.

271

Methane and nitrogen in the mixture 100 CH4-f 100 N2 give
117.7 H2, 3.4 CH4, 74 N2, and a solid body having approxi-
mately the composition, C8Hi2N"4 (Berthelot !).

Ethane. — From pure ethane Berthelot, at the beginning
of the experiment, obtained (1. c.) a little acetylene and ethylene
besides a resinous hydrocarbon. He found at the end of the
experiment, from 100 C2H4i 107.8 H2; 0.7 CH4, Ci0Hi8. The
unsaturated hydrocarbons had become polymerized.

Ethane and carbon monoxide yielded Hemptinne (1. c.) chiefly
acetaldehyde, also some acetone:

Ethane and nitrogen. — There were obtained from 100 C2H6 +
100 N2 (Berthelot) : 98.2 H2, 3.0 CH4, 73.5 N2, Ci6H32N4.
Ethylene.— 100 C2H4 gave 25.15 H2, 4.35 C2H6 (C8Hi4)ra
(Berthelot). In former experiments Berthelot had obtained a
fluid (C2oHi6.e) already observed by Th^nard.
Ethylene and nitrogen. — 100 C2H4 + 100 N2 gave 28.6 H2,
0.4 C2H6; 62.2 N2, Ci6H32N4.
Propylene.— 100 parts yielded: 34.2 H2, 0.7 CH4, Ci6H26.
Propylene and nitrogen. — 100 CaHe + lOO N2 gave 17.8 H2;
60.5 N2j Ci5H28N4. '
Trimethylene.— 100 C3H6 -» 37.3 He, 1.4 CH4, Ci5H26.
Trimethylene and nitrogen. — 100 C3H6 + 100 N2~»41.4H2,
1.6 CH4, 61.4 N2, Oi5H26N4.
Acetylene.— 100 C2H2 -> 1.8 H2, 0.8 C2 H4, 0.08 C2H6; and an
explosive substance. In the presence of hydrogen this sub-
stance is partially absorbed by the acetylene.
Acetylene and nitrogen. — 100 C2H24-100N2 gave no hydro-
gen and no hydrocarbon, but 88.6 N2 and a solid substance,
Ci6Hi6N2.
AUylene.— 100 C3H4-»3 H2, (C16Hi9)2.
Allylene and nitrogen. — 100 C3H4 + 100 H2 -> 82.2 N2,
Ci5H20N2.
In the experiments of Berthelot the gas analyses refer to
the residual gas volume after the discharge has acted on the