SMITHSONIAN 



CONTRIBUTIONS TO KNOWLEDGE. 



VOL. XXIY. 



'BVEIIY MAN IS A VALUABLE MEMBER OF SOCIETT, WHO, BY HIS OBSERVATIONS, RESEARCHES, AND EXPERI- 

 MENTS, PROCTTRES KNOWLEDGE FOB MEN." — SmITHBON. 



CITY OF WASHINGTON: 



PUBLISHED BY THE SMITHSONIAN INSTITUTION. 



1885. 



