PEACH AND THE PEAR. 211 



one of the chief essentials in a take. This rapid evapo- 

 ration through the leaves, gives us some valuable hints 

 in transplanting pear or any other trees — always strip a 

 tree of leaves before transplanting it — if you don't, the 

 evaporation will be so rapid through the leaves that the 

 tree will wither and die, but strip off the leaves and then 

 transplant, and the tree sap wiil stay there and supply 

 the tree until it has become accustomed to its new con- 

 dition. So in moving a tree whilst in the growing 

 season, and some of the roots are sacrificed in getting it 

 up, you must also cut off some of the top, as too many 

 leaves would cause too rapid evaporation for those roots 

 that remain. 



The uses of the leaves of the tree being so neces- 

 sary, it may well be seen what an injury the slug may 

 prove to the Pear tree, especially when it often destroys 

 a greater portion of its leaves. 



The bark performs a duty for the tree somewhat 

 similar to that of the leaf, and with its adjoining cells 

 preserves the identity of the class, as pear, apple, peach, 

 etc. 



Here is a beautiful evidence of nature in preserving 

 her identity, — bud the pear on the quince — all the leaves 

 will grow on the pear top — yet all the nourishment these 

 leaves make and send down the tree will make quince 

 wood and bark on the quince, and pear wood and bark 

 on the pear. 



