TRANSACTIONS 



OF THE 



American Philosophical Society 



HELD AT PHlLAr3ELPHIA 



For Promoting Useful Knowledge 



Neiv Series, Vol. XXI, 

 Part IVy ^to, ij^ pages, with jo plates. 

 '••' (Lately Published.) 



A Study of the Brains of Six Eminent Scientists and Scholars 

 Belonging to the American Anthropometric Society, together 

 with a Description of the Skull of Professor E. D. Cope- 

 By Edw. Anthony Spitzka, M.D. 



Part Vy 4to, yg pages. ( Lately Published.) 



A Search for Fluctuations in the Sun's Thermal Radiation 

 through their Influence on Terrestrial Temperature. 

 By Simon Newcomb. 



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