140 Vegetable Staticks. 



fap of other branches 5 efpecially when fome 

 months alter the inoculation, the ftock of 

 the inoculated Jeffamine is cut off a lit- 

 tle above the Bud ; whereby the ftock , 

 which was the counter acting part to the 

 Item, being taken way, the ftem attracts 

 more vigoroufly from the Bud. 



Another argument for the circulation of 

 the fap, is, that fome forts of graffs will 

 infect and canker the flocks they are grafted 

 on: But by Exper. 12 and 37, where mer- 

 curial gages were fixed to frefh cut ftems of 

 trees, it is evident, that thofe ftems were 

 m a ftrongly imbibing ftate 5 and confe- 

 quently the cankered flocks might very like- 

 ly draw fap from the graff, as well as the 

 graff alternately from the ftock ; juftinthe 

 fame manner as leaves and branches do 

 from each other, in the viciffitudes of day 

 and night. And this imbibing power of the 

 ftock is fo great, where only fome of the 

 branches of a tree are grafted, that the re- 

 maining branches of the ftock will, by their 

 firong attraction, ftarve thofe graffs ; for 

 which reafon it is ufual to cut off the great- 

 eft part of the branches of the ftock, leav. 



ing 



