192 New Low Temperature Phenomena. [Jan. 20, 1905. 



absorbs for a time all the hydrocarbons, such as marsh gas and 

 ethylene, upon which the luminosity of the flame of coal gas depends, 

 leaving practically carbonic oxide and hydrogen. 



This preliminary investigation suggests many fields for further 

 inquiry, and some of these I hope to deal with in future lectures. 



My thanks are due to my chief assistant, Mr. Robert Lennox, 

 F.C.S., for valuable aid in the conduct of the experiments ; and 

 Mr. J. W. Heath, F.C.S., has also helped in the progress of the work. 



[J.D.] 



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