SMITHSONIAN 



VOL. XV. 



'•BVERT MAN TS A TALrABLB MEMBER OP SOCIETY WHO BT HIS OBSERVATIONS, RESEAaCHES, 

 AND EXPERIMENTS PROCURES KNOWLEDGE FOR MEN. " — SMITHSON. 





WASHINGTON: 

 PUBLISHED BY THE SMITHSONIAN INSTITUTION. 



1878. 



