THE SCHOOL OF FRUIT-TREES. 



one of which the shell is naked, as the fir-apple 

 and hazel-nut, and in the other, enveloped in a 

 husk, as the walnut and chesnut. 



At the bottom of the plantation are peach- 

 trees affording models of wail- fruit ; and other 

 trees singularly pruned. 



This enclosure was planted in 1 792, while M. de 

 St. Pierre was intendant of the garden. Two 

 individuals of each species were obtained from 

 the celebrated nursery of the Chartreux, and 

 from that of Yitry which furnished Duhamel 

 with the subjects and names of his treatise ; it 

 consequently offers a type of that work, and a 

 standard for the nomenclature. 



The trees are generally grafted at the surface 

 of the ground, and pruned in the shape of a 

 distaff, which has been chosen, not because it 

 is generally the best, but because it economises 

 room, is the most convenient for observation, and 

 gives birth to longer and more vigorous shoots ; 

 the object being to facilitate study and multiply 

 the different species, and not to exemplify the 

 method of rendering trees the most long-lived 

 and productive. 



Complete series of the species cultivated in this 

 garden have been sent to Ghent, Strasburg, and 

 Vienna, where nurseries have been formed upon 

 the same plan and with the same nomencla- 



