1 8 Canker. 



the two together, but I have also found 

 canker where I have failed to discover the 

 fungus. 



From my own observation I have found the 

 fungus upon the upper portion of young 

 trees — not on old trees, nor on bark above 

 three or four years of age ; immediately 

 beneath the fungus the bark is dead, that 

 surrounding it being green and full of life 

 when cut with a knife; below and to the base, 

 including the branches, are the black blotches 

 which eventually become cancerous. These 

 throw out globules of clear turpentine, extend, 

 open into sores, and form cavities which rapidly 

 increase as the growth of wood proceeds. 

 This is not a new disease, but one to which 

 the larch is liable to some extent in its native 

 land ; but there it is hardly looked upon as a 

 disease, but is made use of where found for 

 the collection of Venice turpentine, the 

 cavities being tapped for the purpose. 



I have myself found, in large trees which 

 were badly cankered when young, deep-seated 

 cells or cavities the size of an egg filled with 

 this beautiful fluid. 



