201 



forms, but to- put them in a condition to 

 grow into such; and that can never be 

 effected otherwise than by pruning, and 

 uniformly admitting air sufficient to per- 

 mit them to grow stiff, but not enough to 

 cause them to grow bushy. 



Plantations of deciduous trees are too 

 thick, when many of the lower branches 

 die annually ; and too thin, where ?ione of 

 them are found in a declining state. The 

 stem may be sufficiently fed, though the 

 side branches grow but slowly. 



It is impossible to be too particular in 

 pressing upon the owners of plantations, 

 the propriety of calling in the aid of so 

 useful, industrious, powerful, and cheap 

 an auxiliary, as Air. Too much, or too 

 little of this article may be ruinous; while 

 the due quantity, introduced, and kept 

 properly in action, by judicious thinning 

 and pruning, may so far inliuence the for- 

 mation of the trees, as to reduce the latter 



o 



