VERNALIZATION 



and 



PHOTOPERIODISM 



hy A. E. MURNEEK and R. O. WHYTE 



with H. A. Allard, H. A. Borthwick, Erwin Bunning, 

 G. L. FuNKE, Karl C. Hamner, S. B. Hendricks, A. 

 Lang, M. Y. Nuttonson, M. W. Parker, R. H. Roberts, 

 S. M. Sircar, B. Esther Struckmeyer and F. W. Went 



Fore-word by Kenneth V. Thimann 



WALTHAM, MASS., U.SA. 

 Published by the Chronica Botanica Company 



