Piva Ns aC lr ON Ss 
OF THE 
AMERICAN PHILOSOPHICAL SOCIETY, 
HELD AT PHILADELPHIA, 
FOR PROMOTING USEFUL KNOWLEDGE. 
VOL. XI.—NEW SERIES. 
PUBLISHED BY THE SOCIETY. 
Whtlavelvhta: 
WILLIAM 8. YOUNG, PRINTER, 52 NORTH SIXTH STREET. 
So 
~ 1860. 
