TRANSACTIONS 



OF THE 



American Philosophical Society 



HELD AT PHILADELPHIA 



For Promoting Useful Knowledge 



Nenv Series, Vol. XXI, 

 Part IV, ^/o, ij/f. 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 V, 4tOy 7p 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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