



PROCEEDINGS 



OK THK 



TcstUmg of j\aittnd Science.'; 



OF 



PHILADELPHIA. 



PART I. January, February, March, April, 1875. 



ri 



PUBLICATION COMMITTEE. 



Joseph Lbidt, M.D., <*bo W. Tryon.Jb., 



\Vm. S. Vaux, Edw.J. Nolan, M.D. 



W. S. W. RuSCHENBEBGER, M.D. 



H ' 



PHILA DELPH LA: 



ACADEMY OF NATURAL SCI E N C E S , 



Corner of Brond and Sansom Streets. 



1875. 



*"*<'i- 



.^~: 



