626 



Prof. W. M. Thornton on the 



combustion began. Pentane, fig- 6, differed somewhat from 

 ethane in the rounded lower limit. The point from which 



•2jq so -*o so eo 



PLATINUM WIRE: OI.CM.DIA. 



1-9 A 



1 io zo 30 ^o so eo 70 CO. 



i 2 3 ^r 5 <5 T S 9 IO If p.C. PARAFFINS. 



•08 PLATINUM . 



the rise starts corresponds to combustion to 00, not to 00 2 . 

 Petrol also has a flat base and a slow approach to the lower 

 limit. The last two are more sensitive to hot-wire ignition 

 than hydrogen. 



