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SMITHSONIAN 



CONTRIBUTIONS TO KNOWLEDGE 



YOL. XY. 



EVEllT MAN 13 A VALUABLE MEMEEK OF SOCIETY, WHO, BY HIS OBSERVATIONS, KESEAKCIIE3, AND EXPERIMENTS, PKOCUEES 



KNOWLEDGE FOR MEN. — SmITHSON. 



CITY OP WASHINGTON: 

 PUBLISHED BY THE SMITHSONIAN INSTITUTION. 



MDCCCLXVII. 



