﻿Bui. 13, U. S. Dept. of Agncultur 



Plate III. 





:•'--■ h * 





WKp 





Fig. 1.— White Pine Prunes Itself Poorly when Grown in Pure Stands. 



Fig. 2.— White Pine Saplings Endangered by Gray Birch and in Need of a 

 Disengagement Cutting. 



