OF GRAFTING. 



329 



maintained in that position by a casing of paper ; all should be secured 

 witb cotton thread, india rubber, or other elastic substance. Those 

 grafts on which the leaves are preserved, should be kept in a moist 



Fig. LVI. 



temperature of between 60° and 75°, without air, and not exposed to 

 bright light for a few days, according to the tenderness of their foliage. 

 The height at which this kind of grafting ought to be performed is 

 quite uncertain. Sometimes it is below the level of the ground on roots 

 left undisturbed ; or upon roots separated from their parent tree, which 

 are planted in the ground after being worked. Most generally, we 

 graft at from four to six inches above the ground, or even higher, up to 

 as much as thirty feet. All scions intended for this sort of grafting 

 ought to be roughly out back in winter, before they exhibit signs of 

 vegetation, to eight or twelve inches above the point intended to be 

 grafted. The object of this is to retain in the stock all the sap for the 

 benefit of the grafts when they come to be put on. The shoots wliich 



