220 Journal of the Asiatic Society of Bengal. [June, 1914. 



Experiment IV. 



Volume per cent of oil gas in mixture = 8*14 



a =00945 sq. cm. 



V 1700 1800 1900 2000 2100 

 T 155 310 465 618 

 T per ■ ■ 100 cc.' ' 155 155 155 153 



Average time per 98*7 cc. = 31 sees. 



Hence R = 335 cm. per sec. 



Experiment V. 



Volume per cent of oil gas in mixture = 873 



a =00935 sq. cm. 



V 800 900 1000 1100 1200 1300 

 T 171 339 — 671 838 

 T per " 100 cc." 171 168 166 167 



Average time per 98*7 cc. = 33 5 sees. 



Hence R = 31*5 cm. per sec. 



Experiment VI . 



Volume per cent of oil gas in mixture = 9* 15 



a =00935 sq. cm. 



V 800 900 1000 1100 1200 

 T 179 364 548 728 

 Tper "100 cc." 179 185 184 180 



Average time per 98*7 cc. = 36*4 sees. 



Hence R = 29 cm. per sec. 



Experiment VII. 



Volume per cent of oil gas in mixture = 10*14 



a =0-0 45 sq. cm. 



V 1300 1400 1500 1600 1700 1800 1900 

 T 255 517 776 1035 1288 1543 

 T per " 100 cc." 2,^5 262 259 259 253 255 



Average time per 98*7 cc. =51*8 sees. 



Hence R = 20 2 cm. per sec. 



Experiment VIII. 



Volume per cent of oil gas in mixture = 12*06 



a =0 683 sq. cm. 



In this experiment a much larger combustion tube had to be 

 used. With the smaller combustion tube the gas could not be 

 driven off slowlv enough to balance the rate of combustion. 



V 2000 ' 2200 

 T 133 

 Tper"100cc" 665 



Average time per 987 ce.= 133 sees. 



Hence R= 109 cm. per sec. 





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