2^6 



wood produced must be perfectly straight, 

 and equall}^ clear of knots ; except mis- 

 management should afterwards occasion 

 the production of unnatural branches. — 

 From such documents it may likewise be 

 learned, that no wound, of a moderate size, 

 and proper form, inflicted upon a healthy 

 tree, can possibly require the use of a p^is- 

 ier. 



The exclusion of air and moisture is 

 certainly all the real service a plaister 

 can render to a tree; and, therefore, 

 where there is no danger from the one, 

 there can be no ?ieed of the other. A 

 wound, of Jive or si:r inches diameter, upon 

 a healthy tree, will heal over before the 

 stump deca3^s ; and such healing effectu- 

 ally prevents decay afterwards. 



It follows from hence, that no other 

 than large wounds, or such as are upon 

 weak trees, can require plaisteiing ; and 

 even in such cases, the time of applica- 



