﻿112 Messrs. H. T. Tizard and D. R. Pye on the 



XVI. It is clear, from the shape of the curve connect- 

 ing time of ignition with temperature, from the results of 

 experiments without the fan, and from the difference in 

 ignition temperature observed with and without the fan, 

 that the temperature coefficient of the reaction is low. 

 If we take T , the ignition temperature without the fan, 



to be 253° 0. = 526 abs., and ^ = 7, we obtain the 







theoretical values for the time of ignition from equation (11) 



which are given in Table XVI. 



The value of o^~~ e is 0*46 x 25 ^~ 32 = 0*193. 

 1 526 



Table XVI. 



T = 526abs. Z>/T = 7*0. 



T/T . 



T (abs.). 



t°G. 



a(?^)*(theor.). 



t (calc). 



1-004 



5228 



255 



0-187 



•98 sec. 



1-01 



531 



258 



0-133 



•70 „ 



103 



542 



269 



0-072 



•38 „ 



1-07 



563 



290 



036 



•19 „ 



111 



584 



311 



0-020 



•105 „ 



1-27 



66S 



395 



0-004 



021 „ 



Fig. 11. 







1 

















it 





Carbon 



disulphic 



e and a 

















[N S. T.rr 



e scale ^ 



alf that 



of Figs. 



10 and 1 

 No ionit 



"■] 









+ 





^ + 















+ 





















No 



ignition. 





0-2 0-3 04 0-5 0-6 07 OS 09 

 Seconds delay. 



The theoretical values are shown by the lower curve in 

 no-. 11. 



