12G I’llOFBSSOK H. B. DIXON ON THB RATE OF EXPLOSION IN GASES. 
Table XX.—Electrolytic Gas with excess of Oxygen added. 
Mixture. 
2 vols. hydrogen 1 
1 vol. oxygen. J 
H 3 +O 
With addition of 
1 vol. oxygen. 
Ho + 0 + 0 
With addition of 
3 vols. oxygen. 
H 0 + O + O 3 
1 
1 
With addition of 
0 vols. oxygen. 
Ho + 0 + O 3 
1 
Theory, <9 . 
2900 
2252 
1730 
1476 
Found, V . 
2821 
2328 
1927 
1707 
Table XXI. — Electrolytic Gas with excess of Nitrogen added. 
Mixture. 
Ho + 0 
Ho + O + N 
H 0 + O + N 3 
H 3 + O + N 5 
Theory, 0 . 
2900 
2321 
1814 
1558 
Found, v . 
2821 
2426 
2055 
1822 
These measurements show that Bebthelot’s formula, which gives a calculated 
rate 3 per cent, too high for pure electrolytic gas, also gives a calculated rate which 
is found to be 16 and 17 per cent, too low for the same gas when largely diluted with 
oxygen and with nitrogen respectively. 
Again, in the explosion of cyanogen to carbonic oxide with its own volume of 
oxygen, and also when the same mixture is diluted with nitrogen, the theoretical 
rates calculated by Berthelot’s formula are far too low :— 
Table XXII.—Cj^anogen and Oxygen with excess of Nitrogen added. 
1 
Mixture. 
1 vol. cyanogen ^ 
1 vol. oxygen. ) 
CoNo+Oo 
With addition of 
1 vol. nitrogen. 
G^^ + Oo + Ns 
With addition of 
2 vols. nitrogen. 
C 2 N 2 +O 0 + 2 N 0 
Tlieory, 0 : . 
I 
2361 
2083 
1877 
Found, r . 
2728 
2397 
2166 
Tlie observed rates of explosion are 15 per cent, higher than the calculated rates. 
Similar differences are found between the observed and the calculated rates when the 
cyanogen mixture is diluted with oxygen. 
When marsh gas and ethylene are exploded with oxygen sulhclent to burn them 
