Trees and Timber 



355 



A branch, broken or sawed off, split by wind, bruised 

 by a falling tree, gnawed by animals, pecked by birds, 



Fomes igniarius upon live beech tree 

 After Atkinson. 



eaten by insects, or wounded in any way, may result in the 

 exposure of heart or sapwood to the fungous spore. From 

 this point of invasion rot spreads in every direction. When 

 decay reaches the trunk, it spreads upward and downward 



