\57 



may have got to its proper size, when the 

 evil takes place, yet, if any considerable 

 portion of the leaves are destroyed, such 

 fruit never ripens, so as to have its proper 

 flavour. 



The point too is recognised by every 

 gardener, in managing his wall-trees. If 

 he find any fruit upon a branch, beyond 

 where leaves appear, he disregards or 

 displaces it, knowing such cannot have 

 a sufficient supply of sap, to bring 

 it to maturity. The case of trees, infest- 

 ed by insects, again proves the point.— 

 As soon as the leaves get unhealthy, and 

 begin to curl, so soon the business of 

 vegetation may be perceived to decline ; 

 and, as the mischief increases, that de- 

 creases, so as frequently to stop it entire- 

 ly ; in wliich case, the death of the plant 

 follows of course.* The case of the Fly, 



* The author had several hundreds of free-growing 

 young Cherry-Trees killed, in this manner, in the 

 summer of 1803, 



