L /77 ^d'<^^?^ ^ 



SMITHSONIAN 



CONTRIBUTIONS TO KNOWLEDGE. 



VOL. XVII. 



EVERV MAN IS A VALUABLE tlEMBEK OF SOCIETY, WUO, BY HIS OBSERVATIONS, KE.SEAROllUS, ASU E.KI'EIUMENT.S, PROCl'BES 



KNOWLEDGE FOR MEN. — SmITHSON. 



CITY OF ^V A SUING TON: 



PUBLISHED IJY THE SMITHSONIAN INSTITUTION. 



MDCCCLXXI. 



