SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 87, NUMBER 14 



THE FUNCTIONS OF RADIATION IN THE 

 PHYSIOLOGY OF PLANTS 



II. SOME EFFECTS OF NEAR INFRA-RED RADIATION 



ON PLANTS 



(With Four Plates) ^.,-rr^HUW I .^is]777/'7?>s. 



y^^ 



NOV 15 1932 



BY 



EARL S. JOHNSTON " 



Division of Radiation and Organisms, Sniitlisonian Institution 



(Publication 3180) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



NOVEMBER 15, 1932 



