362 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Messrs. C. Lindmueller, D. II. Walker, C. R. Cummins, and H. A. 

 Triebiiig; in distillation and analysis, Mr. C. S. Richards; analysis and 

 molecular weight determinations, valuable aid from Mr. O. J. Sieplein. 



It is my intention to make later a summarization in a separate paper 

 of the results published from the beginning in this series of papers on 

 petroleum. 



