PROCEEDINGS 



OF THIS 



ACADEMY OF NATURAL SCIENCES 



OF 



PHILADELPHIA. 



No. 1.- January, February, March, April, 1870. 



PHILADELPHIA: 



ACADEMY OF NATURAL SCIENCES, 

 Corner of Broad and Sansom Streets. 

 1870. 



Merrihew & Son, Printers, 243 Arch St., Philadelphia. 



