Denham.— The Temperature of Combustion of Methane. 41 



more active— namely, to aiding the union of hydrogen and 

 oxygen. 



5. The catalytic action of the palladium does not appear to 

 be due to a previous oxidation of the metal. 



6. In no case has anything approaching complete combus- 

 tion been observed, although at times the gas was 150° above 

 its temperature of combustion. This is directly contrary to 

 the work of Phillips, but in good accord with the recently 

 published work of Richardt. 



In conclusion, I feeFthat I cannot close this paper without 

 expressing my deep gratitude to Dr. W. P. Evans for his 

 kindly assistance and encouragement, and also to Dr. C 

 Parr for the loan of electrical apparatus. 



C 



