PLATE II 



The Effect of Light upon Early Development 



Fig. i. The effect of light upon the development of Finns pmnU'rosa 

 (S. D.). Ten plants each (i) grown in open li^ht, (2) grown in medium 

 shade. 5/s natural size. 



y* 



Fig 2. The effect of light upon the development of Robinia pscudncocia. 

 Three plants each (i) grown in open light, (2) in medium shade, (3) in 

 dense shade. Y% natural size. 



