% 



290 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Commercial Paraffine gave the following indices: 

 Per cent of solvent, 78.97. 

 " " " solid, 21.03. 



Sp. gr. of mixture. Sp. gr. of solid. 



60° 0.7784 0.7788 



70° 0.7727 0.7732 



The results described above show a close agreement in the hydro- 

 carbons separated directly from petroleum, and the corresponding bodies 

 from paraffine, as well as the application of this method for obtaining the 

 molecular refraction of solid bodies. 



