SMITHSONIAN 



VOL. XXVIII. 



■ EYERT M.4N IS A VALUABLE MEMBER OF SOCIETY WHO BY HIS OBSERVATIONS, RESEARCHE3, 

 AND EXPERIMENTS PROCURES KNOWLEDGE FOR MEN." — SMITHSON. 



Ji6o3(^ 



WASHINGTON: 

 PUBLISHED BY THE SMITHSONIAN INSTITUTION. 



1887. 



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