PLATE V 
Tue Errect oF Soil Texture upoN EArty DEVELOPMENT 
Fic. 1. The effect of soil texture upon the development of Pinus pon- 
derosa (S. D.). Ten plants each (1) grown in loam, (2) grown in sand, 
(3) grown in gravel. % natural size. 
Fic. 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. 4 natural size. 
