22 THE WHITE PINE 



strongly with the ashen-gray bark of the old 

 Pine. 



The Hemlock is of very slow growth, and re- 

 mains behind the Pine from its youth up. But 

 it withstands much more shade than the latter, 

 one result of which appears in its longer crown, 

 and it continues to flourish under cover until 

 finally it grows up among the Pine and clears 

 it of its lower branches. This most useful result 

 follows chiefly from the extreme sensitiveness 

 of the lower branches of the Pine to any shade, 

 and is accomplished to the height of the Hemlock. 



In dense old groups of Hemlock young growth 

 is often found still thriving, but growing very 

 slowly. This tree prefers northern and eastern 

 slopes and cool situations. It reproduces itself 

 easily. Young growth could be secured at will 

 under forest management. Young seedlings 

 are abundant even under very dense shade. 



Where the two occur together the practice of 

 Pennsylvania lumbermen is to cut the Pine the 

 first year, and the Hemlock in the following 

 season. 



It is said that the Hemlock, if it is allowed to 

 stand, dies off within a few years after the re- 

 moval of the Pine. That this frequently hap- 

 pens is true. It is accounted for partly by the 

 sudden exposure of trees which have stood for 



