37 



■lujit 



cepting the cafe of a few bleeding trees when 

 cut in that feafon, but muft arife from fomc 

 other caufej for by Experiment 12 and 37. 

 where mercurial gages were fixed to the {terns 

 of frefh cut trees, thofc wounds were con- 

 stantly in a llrongly 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 

 ill, id 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 from the root. Where- 

 as on the other hand, when a luxuriant 

 tree is pruned late in the fpring, the force 

 of its leaves to attrad fap from the root 

 will be much fpent and loft at the feveral 

 frefh cut inlets. 



Befides, the early pruned tree being eafed 

 of feveral 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 afcend in the winter, lefs of 



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