SPACING THE TREES IN THE FOREST 125 



three feet apart, and at ten years from setting sorely needed 

 thinning ; while on the same estate others had been set six- 

 teen feet apart, and at twenty years most of their lower 

 limbs were still alive, and thinning would do little good, 

 in fact would be detrimental. Then, some species require 

 less thinning than others at a given date from planting, and 

 only from a knowledge of actual conditions and an inspec- 

 tion of the premises can any definite conclusion be drawn. 

 When one is familiar with the life-history of a tree and 

 the laws which govern tree-growth there is little danger of 

 going astray. 



