SYLVICULTURAL NOTES ON MAPLE. 259 



The treatment of Chestnut in nurseries is similar to 

 that described for Oak (page 24G). 



i. Tendin</. 



Young Chestnuts must be protected against late and 

 early frosts, either by sheltering them artificially, or by 

 raising them in sheltered localities. They also require 

 protection against cattle and deer, which browse them. 



Damage by insects and fungi is not of much im- 

 portance. The only part of the Sweet Chestnut liable, 

 as a rule, to damage by insects is the fruit, the crop 

 of which may be much lessened by the internal-feeding 

 larvae of species of Carpocapsidce among the Tortrices. 



The Chestnut stands pruning well. 



Thinnings are done as in the case of Oak. 



7. MAPLE =Acer (L.). 



The following two species are grown as forest trees in 

 Britain : 



(1.) The Great Maple, or Sycamore = Acer Pseudo- 



platanus, L. 

 (2.) The Norway Maple = Acer platanoides, L. 



a. Utility. 



The white or yellowish-white timber of the two 

 Maples is moderately heavy (Sycamore, sp. gravity, air- 

 dried, = '66, Norway Maple = -68), hard, fairly durable 

 under cover, but of short duration in the open. It has 

 great heating power, but is not an agreeable fuel for 



