SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 93, NUMBER 4 



PIONEER WIND TUNNELS 



(With 4 Plates) 



BY 



N. H. RANDERS-PEHRSON 

 Assistant, Division of Aeronautics, Library of Congress 



(Publication 3294) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



JANUARY 19, 1935 



