1904.] 



on Lifiuid Hydrogen Calorhnetnj. 



587 



stance previously weighed. The substance, if left under normal 

 conditions, in this way falls from the temperature of the room to that 



of liquid air. The heat given up by it to the liquid air volatilises 

 some of it, which is carried off bv the branch tube and measured in 

 Vol. XYII. (No. 98.) ' 2 e 



