falling on them, which would not only 
refrefli and fupple them, but alfo convey 
nourifhmcnt to them : But in the cafe of 
fharp frofts after fhowers of rain, thefe fhel- 
ters and other fences rmift needs be of ex- 
cellent ufe to prevent the almoft total de- 
ftrudion which is occafioned by the freez- 
ing of the tender parts of vegetables, when 
they are full faturate with rain. 
The full proof we have from thefe Ex„ 
periments, of the ferviceablenefs of the leaves 
in drawing up the fap, and the care we fee 
Nature takes, in furnifliing the twigs with 
plenty of them, principally near the fruit* 
may inftruft us on the one hand, not to be 
too lavifh in pruning them off, and to be 
ever mindful to leave fome on the branch 
beyond the fruit 5 and on the other hand, to 
be as careful to cut off all fuperfluous fhoots^ 
which we are allured do draw off in wafte 
great quantity of nourifhment. And might 
it not be advifeable, among many other ways 
which arc preferibed, to try whether the 
too great luxuriancy of a tree or branch 
could not be much checked by pulling off 
fome of its leaves? How many experience 
will beft teach us, the pulling all off will 
endanger the killing the branch or tree. 
There is another very confiderable ufe of 
