cut in that feafon, but mud arifc from fom« 
other caufej for by Experiment 12 and 37, 
where mercurial gages were fixed to the ftem* 
of frefh cut trees, thofe wounds were con- 
ftantly in a ftrongly imbibing ftate, except 
the Vine in the bleeding feafon. 
When a weak tree is pruned early in the 
beginning of the winter, the orifices of the 
fap-veffels are clofed up long before the fpring, 
as is evident from many Experiments in the 
ift, 2d and 3d chapters > and confequently 
when in the fpring and fummer the warm 
weather advances, the attracting force of the 
perfpiring leaves is not then weakened by 
many inlets from frefh wounds, but is wholly 
exerted in drawing fap front the root. Where- 
as on the other hand, when a luxuriant 
tree is pruned late in the fpring, the force 
of its leaves to attraft fap from the root 
will be much fpent and loft at the feverai 
frefh cut inlets. 
Befides, the early pruned tree being eafed 
of feverai of its twigs or branches, has there- 
by the advantage of {landing thro* the whole 
winter, with a head better proportioned to 
its weak root. And fince by Exper. 16. the 
fap is found to afeend in the winter, lefs of 
that than cold crude juice is drawn thro" 
the roots and item, to fupply the perfpi- 
ration 
