SMITHSONIAN MISCELLANEOUS COLLECTIONS 

 VOLUME 144, NUMBER 2 



DIMENSIONAL RELATIONSHIPS 

 FOR FLYING ANIMALS 



By 

 CRAWFORD H. GREENEWALT 



President, E. I. du Pont de Nemours & Co. 





\\i 





3j-: 



(Publication 4477) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



April 6, 1962 



