PROCEEDINGS 



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V CENTRAL P *\ 



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OF THE 



ACADEMY OF NATURAL SCIENCES 



OF P II I L A D E L PHI A . 



VOL. VII. 1854, 1855. 



PHILADELPHIA. 



1> R I N T E D F It T II E ACADEMY: 

 By Merrihew & Thompson, Merchant 6trect above Fourth. 



185G. 



