PROCEEDINGS 



OF THE 



I ll;l;M;Y 



AMERICAN PHILOSOPHICAL SOCIE^fY 



(;/j/.iiiui'G.r,iu/. 



HELD AT PHILADELPHIA 



FOR 



PROMOTING USEFUL KNOWLEDGE 



Vol. XVI. 



JANUARY 1876 to MAY 1877. 



PHILADELPHIA : 

 PRINTED FOR THE SOCIETY 



BY m'C^I-LA & STATELY. 

 Sn 1877. 



