318 PKOF. W. A. BONE AND OTHERS ON GASEOUS COMBUSTION, ETC. 



hardly any appreciable cooling during an interval of 0' 22 seconds after the attainment 

 of maximum pressure. This circumstance may possibly be attributed to (l) the 

 combustion taking place in well defined chemical stages, and also to (2) the operation 

 of the exothermic secondary interaction between carbon monoxide and steam during 

 the cooling period. The cooling is rather more rapid in the case of the carbon 

 monoxide-air mixture, and still more so in the case of the hydrogen-air mixture. 

 The last named would appear to be a simple cooling curve uninfluenced by chemical 

 combination. 



Our thanks are due to the Government Grant Committee of the Society for liberal 

 grants out of which the cost of the expensive apparatus employed on the work has 

 been defrayed. 



