CHERRIES AS PYRAMIDS. 91 



The best of all protection, both from birds and wasps, 

 is, however, Haythom's netting, or coarse muslin, 

 formed into a narrow bag, which should be let down 

 gently over the tree, and tied at the bottom; Duke 

 cherries may thus be preserved till August. I may 

 mention here, that with all these cordon trees, root- 

 pruning or removal is seldom required, their vital 

 force is so reduced by continuous pinching of the 

 young shoots ; but if a rich soil gives too much vigor, 

 it may be practised. There are a few kinds of plums, 

 of upright growth, which may also be cultivated as 

 vertical cordons. 



The Bigarreau and Heart, or Guigne cherries, are 

 too vigorous for this mode of culture when grafted or 

 budded, as they generally are, on the common cherry 

 stock. The new mode of culture by double grafting, 

 i. e., by grafting them on young trees of the common 

 Morello cherry that have been grafted on the Mahaleb, 

 will make them most prolific cordons. (See p. 102.) 



I must add a piece of very necessary advice : all 

 cordon trees, whether pears, apples, cherries, or plums, 

 should be supported by a slight iron rod, about the 

 size of a goose-quill, which should be painted ; this 

 should stand six to seven feet above the surface, and 

 be inserted ten to twelve inches in the ground, and 

 the tree attached loosely to it by two or three ligatures 

 of copper wire. 



BIGABKEATT AND HEAET CHEEEIES AS PYEAMIDS ON THE 

 COMMON CHEEET STOCK. 



Among the mysteries of vegetable physiology, there 

 is nothing, perhaps, more interesting than the facta 



