62 



PROCEEDINGS OF THE AMERICAN ACADEMY 



2. Isomeric (?) with the Marsh-gas Series. 



3. Ethylene Series. 



Having already given in one of the memoirs above referred to a 

 detailed description of the process devised for the separation of the 

 constituents of such complex mixtures of liquids as that under 

 consideration, and which was employed in this research, these 

 details are here omitted. I should state, however, that in con- 

 ducting the separations in this case, the same exhaustive method 

 was pursued as therein described.* By this treatment, the inter- 



* Memoirs of the American Academy, (N. S.) IX. 130-134. 



