SMITHSONIAN 



/S 



CONTRIBUTIONS TO KNOWLEDGE. 



VOL. X. 



EVERT MAN IS A VALUABLE UEMBSB OF SOCIETY, WHO, BY HIS OBSERVATIONS, RESEARCHES, AND EXPERIMENTS, PROCURES 



ENOWLEDQE FOR MEN. — SmITHSON. 



CITY OP WASHINGTON: 

 PUBLISHED BY THE SMITHSONIAN INSTITUTION. 



MDCCCLVIII. 



