BEST KINDS OF STOCKS. 49 



tities of young pear trees on roots of their own species, 

 while those on quince nearly all escaped. 



Sometimes a change in the character of the soil renders 

 certain stocks desirable for particular localities. The White 

 Doyenne pear flourishes finely on the quince in some places 

 where it is otherwise cracked and worthless. Dr. Lindley 

 found that in the chalky soil at Rouen, the peach on plum, 

 and cherry on cherry, were languid and sickly ; while in 

 ihe same garden, the peach was healthy and vigorous on the 

 limond, and the cherry on the Mahaleb stock. But in rich 

 ^r'.ificial soil, composed of other ingredients, the two latte'* 

 were again feeble in their turn. 



