JK Magazine of General Botany 



VOLUME 12 

 NUMBER 9 

 SEPT. 1909 



Containing 



What is the use of Respiration 



By George J. Peiree 193 



Quercus Leana; a Hybrid Oak 



By Louis \V. Sauer 198 



The Light Requirement of Plants 



By Joseph Y. Bergen 201 



The Present Status of Plant Pathology 



By Venus W. Pool 205 



Books and Current Literature 210 



Notes and Comment .214 



Tucson, Arizona 



Entered as Second Class Matter, Dec 17, 1907, at the Post-Office, Tucson, 

 Arizona, under the Act of Congress of March 3, 1879 



