Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLIII. No. 21. — June, 1908. 





CONTRIBUTIONS FROM THE CHEMICAL LABORATORY OF 

 HARVARD COLLEGE. 





CONCERNING THE V SE OF ELECTRICAL HEATING 

 IN FRACTIONAL DISTILLATION. 



By Theodore W. Richards and J. Howard Mathews. 



Investigations on Light and Heat made and published, wholly oe in part, with Appropriation 



feom the r0mford fund. 



