DWARFING. 159 



all mere mechanical applications, must be uniform, whether 

 the necessities of the trees be -equal or not; whereas, by 

 hand-labor, we may vary the distance at which the roots 

 are to be cut, according to the vigor and size of the trees 

 demanding the treatment. 



This topic will be again referred to in the chapter on 

 Pruning, where also it will be necessary to recur to the 

 subject of Training, which was incidentally alluded to in 

 connection with Dwarfing. 



