Proceedings of tlie American Academy of Arts and Sciences. 

 Vol. XXXir. No. 5. — January, 1897. 



CONTRIBUTIONS FROM THE CHEMICAL LABORATORY 

 OF THE CASE SCHOOL OF APPLIED SCIENCE. 



INVESTrOATIONS ON AMERICAN PETROLEUM. 



By Charles F. Mabery. 



XXVI. — ON THE BUTANES AND OCTANES IN 

 AMERICAN PETROLEUM. 



By Charles F. Mabery and Edward J. Hudson. 



Aid cj the wobk described ix this Paper was given by the Academy from the C. M. Warren 



Fund for Chejiical Research. 



