Biochemical Bulletin (Vol. Ill) 



Plate b 



WILSON : STUDIES OF PLANT GROWTH IN HEATED SOIL 



Fig. 6: Rye seedlings one week after germination; Fig. 7: Rye seedlings— 

 the same culture after the lapse of one week; Fig. 8: Barley seedlings at the end 

 of the first week. 



