FOREST TREES 



species of great economic importance. 

 Lastly, in their habit of denser growth, 

 and from the fact that these trees are 

 ordinarily found in the form of " pure " 

 forests (in contradistinction to those 

 forests in which a number of species 

 grow intermingled), they furnish cer- 

 tain very important conditions for prac- 

 tical and successful forestry. 



The common white pine well de- 

 serves to stand at the head of all the 

 conifers or evergreens east of the Mis- 

 sissippi. Though it once covered vast 

 areas in more or less "pure" forests 

 it has been largely cut away, and re- 

 curring fires have generally prevented 

 its return; but in certain places it could 

 even now be restored by careful treat- 

 ■ ment. At present the last remnants of 

 ' these pineries are disappearing swiftly, 

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