THE TRAINING OF A FORESTER 



to keep a post oak in the best condition, and 

 the warm climate in which the balsam fir 

 would perish is just suited to the require- 

 ments of a long leaf pine or a magnolia. 



The tolerance of a tree for shade may 

 vary greatly at different times of its life, 

 but a white pine always requires more light 

 than a hemlock, and a beech throughout its 

 life wiU flourish with less sunshine or re- 

 flected light than, for example, an oak or 

 a tulip tree. 



Trees are limited in their distribution also 

 by their adaptability, in which they vary 

 greatly. Thus a bald cypress will grow both 

 in wetter and in dryer land than an oak; a 

 red cedar will flourish from Florida to the 

 Canadian line, while other species, like the 

 Eastern larch, the Western mountain hem- 

 lock, or the big trees of California, are con- 

 fined in their native localities within ex- 

 tremely narrow limits. 



2 17 



