THE MAMIFESTATIOI OF DISEASE 



TEE CAUSES MB SEMEDIES. 



oJSKo- 



The term " disease " in its relation to trees is 

 not altogether a happy or correct one, but for 

 the want of a better I accept it. If we take 

 the definition of the word, however, in its 

 restricted sense, namely, the state of a living 

 body in which the natural functions of the 

 organs are interrupted or disturbed, it will be 

 applicable enough. In its more extended 

 sense disease is not found in forest trees. 

 We have in our woodland areas trees in 

 health and trees with health more or less 

 impaired, and the duty of the forester is to 

 detect the presence of disease with a view to 



