262 OF GRAFTING AND BUDDING. 



whatever be the stock or tree* on which they are 

 grafted. 



The principle or philosophy of grafting is some- 

 what obscure; and had not accident given the 

 first hint, all our knowledge of Nature would 

 never have led us to it. The effect is ordinarily 

 attributed to the diversity of the pores or ducts 

 of the graft from those of the stock, which change 

 the figure of the particles of the juices in passing 

 through them to the rest of the tree. 



Mr. Bradley, on occasion of some observations 

 by Agricola, suggests something new on this head. 

 The stock grafted on, he thinks, is only to be 

 iconsidered as a fund of vegetable matter which 

 is to be filtered through the cion ; and digested, 

 and brought to maturity, as the time of growth 

 in the vessels of the cion directs. A cion, there- 

 fore, of one kind, grafted on a tree of another, 

 may be rather said to take root in the tree that it 

 is grafted in, than to unite itself with it ; for it is 

 visible, that the cion preserves its natural purity 

 and intent, though it be fed and nourished by a 

 mere crab; which is, without doubt, occasioned 

 by the difierence of the vessels in the cion from 

 those of the stock ; so that grafting may be justly 

 compared to planting. 



In prosecution of this view of that ingenious 

 author, we add, that the natural juices of the 

 earth, by the secretion and comminution in pas- 

 sing through the roots, &c. before they arrive 

 at the cion, must doubtless arrive there half 



