PLATE V 



The Effect of Soil Texture upon Early Development 



Fig. i. The effect of soil texture upon the development of P'.nus pon- 

 derosa (S. D.). Ten plants each (i) grown in loam, (2) grown in sand, 

 (3) grown in gravel, yi natural size. 



Fie. 2. The effect of soil texture upon the development of Robinia pseu- 

 dacacia. Three plants each (1) grown in loam, (2) grown in sand, (3) 

 in gravel. Vs natural size. 



