Dr. C. A. Shull, Professor of Plant Phys- 

 iology, University of Chicago. Respiration. 

 Dr Shull, through his connections with "Bo- 

 tanical Gazette" and "Plant Physiology," has 

 been very influential in the "physiological 

 press" of the United States. 



Dr R. Willst'atter, Professor of Biochem- 

 istry University of Munich, Germany. Chemis- 

 try of chlorophyll and related pigments; Enzymes. 



