230 APPLICATION OF PRINCIPLES. 



of explanation. In the case of the common stocks 

 employed for the propagation of the Apple, Pear, 

 Peach, and Cherry, it was found by Mr. Dubreuil, 

 an intelligent gardener at Rouen, that in the chalky 

 gardens about that city neither the Plum nor the 

 wild Cherry would succeed for stone fruit, nor the 

 Doucin or Quince stock for Pears and Apples ; but 

 that the Crab suited the Apple, the wild Pear the 

 cultivated Pear, the Almond the Peach, and the Ma- 

 haleb the Cherry. I formerly witnessed the result of 

 those experiments while in progress, and I well 

 remember the sickly state of his peaches and Cherries 

 grafted on Plum and Cherry stocks in the calcareous 

 borders of the rampart gardens of Eouen, and the 

 healthiness of the same fruit trees in the same garden, 

 when worked upon the Almond and the Mahaleb, 

 while the latter were unhealthy in their turn in the 

 borders composed artificially of loam. The result 

 of this experiment has been mentioned in the Hort. 

 Trans.., iv. 566, and is as follows : — 



As this work treats exclusively of those operations 

 in gardening which can be explained upon known 



* That is, with an admixture of sand and decayed vegetable 

 matter. 



f By Wild Cherry here is meant Mazzard, and not our Wild Cherry, 

 A. J. D. 



