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C 328 ) 
the feveral Branches by the Leaves which are there 
expos’d to the warm Sun and free drying Air,v/here- 
by the Branches of Trees expand much. 
“ And where the lateral Branches are very vigo- 
rous, fo as to mak^ Brong flioots, and attrad the 
Nourifliment plentifully, there the Tree ufually a- 
bates of its height • But where the Tree prevails in 
height, as in Groves, there commonly its lateral 
Branches are fmalleB. So that we may look upon a 
Tree as a complicated Engine, which has as many 
diilerent Powders as it has Arms and Branches, each 
drawing from their common Fountain of Life the 
Root: And the whole of each yearly grow th of the 
Tree will be proportionable to their attrading Pow*- 
ers, and the Quantity of Nourilhment the Root af- 
fords Bur this attracting Power and Nourifliment 
will be moreor lefs, according to the diBerent Ages 
of the Tree, and the more or lefs kindly Seafons of 
the Year. 
“ And the proportional growth of their lateral and 
Top-Branhes in relation to each other, wall much 
depend on the difTerence of their feveral attrading 
powers. 'If the Perfpiration and Attradion of the 
lateral Branches is little or nothing, as in Woods and 
Groves, then the Top-Branches wdll mightily pre- 
vail ; but when in a free open Air the Perfjliiration 
and Attradion of the lateral Branches come nearer 
to an Equality with that of the Top, then is the a- 
fpiring of the Top-Branches greatly check’d. And 
the cafe is the fame in moft other Vegetables, whicli 
when they Band thick together, grow much in length 
witli very weak lateral Shoots. 
“ And as the Leaves are thus ferviceable in promo- 
the growth of a Tree, we may obf€rve,that Nature 
has plac’d the Pedals of the Leave-Balks where moB 
“ Nou- 
