100 PROFESSOR H. B. DIXON ON THE RITE OF EXPLOSION IN GASES. 
In the following tables the rates of explosion of simple mixtures as measured by 
Berthelot are compared with the theoretical velocity of the products of combustion 
calculated from Clausiu's’ formula. The temperature T is calculated on the supposi¬ 
tion (1) that the gases are heated at constant pressure, and (2) that the specific heat 
of a componnd gas is the sum of the specific heats of its constituents. 
Table T.— Berthelot’s Experiments. Combustible Gases with Oxygen. 
Gases. 
Velocity in metres per second. 
Calculated. 
Found. 
Hydrogen. 
2831 
2810 
Carbonic oxide. 
1940 
1090 
Marsh gas. 
2427 
2287 
Ethane . 
2483 
2363 
Ethylene. 
2517 
2210 
Acetylene. 
2660 
2482 
Cyanogen . 
2490 
2195 
Table II.—Combustible Gases with Nitrous Oxide. 
Gases. 
Velocity in metres per second. 
Calculated. 
Found. 
Hydrogen.. 
2250 
2284 
Carbonic oxide. 
1897 
1106 
Cyanogen . 
2198 
2036 
Berthelot observes that the formula does not apply to mixtures of carbonic oxide 
