GROWTH IN HEKiHT. 



55 



tree which excels in it, but also the chance to spread 

 laterally, and so to complete the defeat of its slower 

 rivals by overtopping- them. 



Fig. 52. Fig. 53. 



A tall clear trunk ma»le by natural pruning, and the base of tbe same tree. 

 Sitka Spruce in the Olympic Forest Eeserve, Washington. 



