d i 



SMITHSONIAN 

 MISCELLANEOUS COLLECTIONS 



VOL. 71 





'every man is a valuable member op society who, by his observations, researches 



AND experiments, PROCCRES KNOWLEDGE FOR MEN" — SMITHSOiV 



(Publication 2656) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



1921 



