Dr. R. B. Harvey, Associate 

 Professor of Plant Physiology, 

 University of Minnesota Farm, 

 St. Paul. Hardiness; Respiratory 

 enzymes; Maturation of fruits and 

 vegetables. 





. _j 



Dr. N. A. Maximov, Profes- 

 sor of Plant Physiology at the 

 Institute for Applied Botany at 

 Leningrad, U. S. S. R. Water 

 relations; Hardiness; Photoperi- 

 odism. 



. 



j 



