84 The Trunk 



this some people think that its white colour helps to 

 keep the tree cool. 



The best example of a thin barked tree growing in 

 the shade is the beech whose smooth thin bark you all 



Fig. 42. Trunk of Plane tree with scaly bark. 



know. If by any chance one of these trees has grown 

 all its life in a very sunny position it is found that its 

 bark tends to become thicker than it usually is. On 

 the other hand if trees which, like the oak, generally 



