PUBLISHED BY THE 



AMERICAN ASSOCIATION 

 FOR THE ADVANCEMENT OF SCIENCE 



FROM THE 



OFFFICE OF THE PERMANENT SECRETARY 



IN THE 



SMITHSONIAN INSTITUTION BUILDING 



WASHINGTON, D. C. 



1940 



[5000 copies printed] 



THE WILLIAM BYRD PRESS, INC. 

 RICHMOND, VIRGINIA, U. S. A. 



