FORMATIVE EFFECT OF HIGH AND LOW TEM- 

 PERATURES UPON GROWTH OF BARLEY: 

 A CHEMICAL CORRELATION 



CONTRIBUTIONS FROM THE HULL BOTANICAL LABORATORY 259 



(WITH EIGHTEEN FIGURES) 



H. L. WALSTER 



Reprinted for private circulation from 

 The Botanical Gazette, Vol. LXIX, No. 2, February 1920 



