Tlie Rate of Explosions hi Gases. 



143 



Table XII. 

 Electrolytic Gas 7vith excess of Nitrogen added. 



These measurements show that Berthelot'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 lozv 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 rate calcu- 

 lated by Berthelot's formula is far too low : — 



Table XIII. 

 Cyanogen and Oxygen ivith excess of Nitrogen added. 



When marsh gas and ethylene are exploded with 

 oxygen sufficient to burn them to carbonic oxide and 

 steam, the observed rates are higher than those given by 

 the formula : — 



