Of Propagating Fruit-trees. 5 1 
invite, it is not good to ftay for worfe. 
Yet obferve, that a Oraft fometimes be¬ 
fore cut and (hick in the ground, and then 
grafted at the riling of the Sap, takes bet¬ 
ter than thofe that are grafted fo foon as 
cut. 
The reafbn alledged is,becaufe the Graff 
being feparated from the Tree from whence 
it had its nourifhment, and having for 
fome time wafted its fap, when it comes 
to a frefh fupply, more greedily attracts it 
than if it had never been expofed to fuch 
an expence. Which amongft many others 
is a very good argument, that all Vege¬ 
tables, afwell Trees that (bed their leaves 
in the winter as others, require and have a 
continual fupply and afcentoffap after the 
leaf is fallen throughout the whole Win¬ 
ter ( except it be whilft extream frofts 
check its motion) to maintain them in their 
viridity and vegetable life : Asappearsby 
the fwellingofbuds of many Trees in the 
midft of Winter, &c. The defcent of fap 
in Trees being only a vulgar errour. 
But the more general riling of the lap 
here, is upon the approaching of the Sun 
into our Northern Hemijphere, opening 
the pores of the Earth, and which by its 
vital and attractive heat and influence, 
F 3 dif- 
