182 DESCRIPTION OF THE MUSEUM. 



vegetables, whilst there are many of preserving 

 and multiplying them, the general plan is divided 

 into ten sections succeeding each other in the 

 following order : 



ist. Seeds sown in the open ground, in hot- 

 beds, under glass, in pots, in water, and on other 

 vegetables ; with the methods of ensuring their 

 developement. 



2d. Slips, and the means of facilitating the suc- 

 cess of such as do not easily take root. 



3d. Layers. 



4th. Grafting; with heteroclite grafts (i). 



5th. Plantations and their various treatment, 

 according to the nature of the trees, their original 

 climate, and the period at which the sap begins 

 to circulate. 



6th. Pruning, either to prolong the life of 

 trees, to give them a particular form, or to change 

 the quantity or quality of their fruit. 



7th. The training of vines, whether detached 

 or in arbours or espaliers. 



8th. Hedges ; divided into those of defence ; 

 simple, double, grafted, and forage hedges. 



9th. Palisadoes of spring, summer, and winter. 



(1) These experiments repeated with great care and in various ways 

 prove that trees having no analogy cannot be grafted upon each 

 other; and that all that has been written from Columella to the present 

 day, on the means of procuring hybridous species and extraordinary 

 fruits, is void of foundation. 



