SMITHSONIAN 



CONTRIBUTIONS TO KNOWLEDGE 



VOL. XVIII. 



EVERT MAN 18 A VALUABLE MEMBER OF SOCIETY, WHO, BY HIS OBSERVATIONS, RESEARCHES, AND EXPERIMENTS, PROCURES 



KNOWLEDGE FOR MEN. — SmITHSON. 



CITY OF WASHINGTON: 



PUBLISHED BY THE SMITHSONIAN INSTITUTION. 



MDCCCLXXIII. 



