1880.] On the Solubility of Solids in Gases. 179* 



This conclusion is based on the relation of volume to pressure for 

 different temperatures, and on the failure of optical tests to show any 

 distinction between gas and. liquid when pressure is applied above the- 



-critical temperature. It occurred to us, that some knowledge might 

 be gained by examining the solvent properties of some fluid for a non- 

 volatile solid, in the passage of the solvent from the liquid to the 



