1904.] on Liquid Hydrogen Ccdorimetry. 589 



be inserted into the calorimeter, immediately a rapid evolntion of 

 gas takes place, until at last the carbonic acid is frozen, and after a 

 little time the evolution ceases. The volume of gas produced from 



the same bulb exhausted is naturally very much less. But we may 

 use the instrument for quite different purposes. Thus, in a small 

 bulb MS placed a mixture of hydrogen and oxygen in the propotions 



2 E 2 



