SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 95, NUMBER 9 



PRELIMINARY OBSERVATIONS ON GROWTH 



AND PHOTOTROPIC RESPONSE OF - . 



OAT SEEDLINGS 



\ 



BY 



JUN 2 1936 



ENOCH KARRER 



Division of Radiation and Organisms 

 Smithsonian Institution 



(PUBLICATIOhf 3389) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



JUNE 2, 1936 



