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The Avorrey . Book L 

is of its broken Bladder, we fhould thence by the fame reafon con- 
clude that they are not penetrable by the breadth neither, and fo no 
way 5 and then it need not be ask’d what would follow. But. cer- 
tainly the Sap in the Bledders of the Pith is difcharged and repaired 
every moment,as by its fhriv’ling up,upon cutting the Plant,is evident. 
32. §. We fuppofe then, that as the Sap afcendeth into the Trunk, 
by the Ligvows Body, fo partly alfo by the Pith. For a piece of. Cottoz 
with one end immers’d in fome tinged Liquor, and with the other 
erect above, though it will not imbibe the Liquor fo far as to. over- 
run atthe top, yet fo asto advance towards it, it will. So here, the 
Pith, being a porous and {pongy Body, and in its Vegetating ftate, its 
Pores or Bladders being alfo permeable, as a curious Filtre of Natures 
own contrivance, it thus advanceth, or as people ufe to fay, fucks up 
the Sap. Yet as it is feen of the Liquor in the Cotton {0 likewife are 
we to fuppofe it of the Sap inthe Pith ; that though it rifeth up for 
fome way, yet is their fome term, beyond which it rifeth not, and 
towards which the motion of the afcending Sap is more and more bro- 
ken, weak and flow, and fo the quantity thereof lefs and lef. But 
becaufe the sap moveth not only by the length, but breadth of 
the{ Pith; at the fame time therefore as it partly afcendeth by the 
Pith, it is likewile in part prefled into the Liguous Body or into its 
Pores. And fince the motion of the Sap by the breadth of the Pith 
not being far continued, and but collateral, is more prone and eafie, 
than the perpendicular, or by its length; it therefore follows, that 
the collateral motion of the Sap, at fuch a height or part of the 
Pith, will be equally {trong with the perpendicular,at another part, 
though fomewhat beneath it; and that where the perpendicular is 
more broken and weak, the collateral will be lefs; and confequently 
where the perpendicular tendency of the Szp hath its term, the colla- 
teral tendency thereof, and fo its preflure into the Pores or Veffels of 
the Ligzous Body, will ftill continue. Through which, in that they 
are fmall, and fo their fides almoft contiguous, the sap as faft as pref= 
fed into them willeafily run up 3 as in very {mall Glafle Pipes, or be- 
twixt the two halves of a Stick firlt flit, and then tyed fomewhat loofe- 
ly together, may alfo any Liquor beobférved to do, By which Ad- 
vantage the facility and ftrength of that afcent will be continued 
higher in the {aid Veffels, than in the Pith. Yet fince this alfo, as 
well as thatin the Pith will have its terms the Sup, although got 
thus far, would at laft be ftagnant, or at leat its afcent be very {pa- 
ring, flow and feeble, if not fome way or other re-inforced. Where- 
fore, as the sap moving by the breadth of the Pith, prefieth thence 
into the Veffls of the Lignous Body {0 having well fill'd thefe, is 
in part by the fame Collateral motion disburfed back, into a yet 
higher Region of the Pith, By which partly, and partly, by that por- 
tion of the Sap, which in its perpendicular afcent was before lodged 
therein 5 ‘tisthus here, as in any inferiour place equally replenifhed. 
Whereupon the force and vigour of the perpendicular motion of the 
Sap herein, will likewife be renew’d ; and fo its Collateral motion alfo, 
and fo its preffure into the Vejéls of the Lignous Body, and confequently 
itsafcent therein: and fo by a preffure, from thefe into the Ph, and 
from the Pzh into thefe, reciprocally carried on ; a moft ready and co- 
pious afcent of the Szp will be continued; from the bottom to thetop, 
though of the higheft Tree, An 

