180 



STUDIES OF TREES 



By utilization, is meant the conservative and intelligent 

 harvesting of the forest, with the aim of obtaining the 

 greatest amount of product from a given area, with the 

 least waste, in the quickest time, and without the slightest 

 deterioration of the forest as a whole. The forester cuts 



1 



Fig. 122. — ^A Forest of Bull Pine Cut on Forestry Principles. (Photo- 

 graph taken on the Black Hills National Forest, South Dakota.) 



his mature trees, only, and generally leaves a sufficient 

 number on the ground to preserve the forest soil and to 

 cast seed for the production of a new crop. In this way, he 

 secures an annual output without hurting the forest itself. 

 He studies the properties and values of the different woods 

 and places them where they will be most useful. He lays 



