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The Anatomy Book I. 
though they are no thicker,than a fingle one might be made 5 yet ftand- 
ing at.a diftance, have a greater ftrength than That could have. And 
the fame Architecture, will have the fame ufe,in the Truzks of Plants; 
in moft whereof ‘tis very apparent; as for inftance, in Corm, For 
Nature defigning its Sap a great Afcent 5 for its higher maturity, hath 
given ita tall Trak: Butto prevent its ravenous defpoiling either of 
the Far, or Soyl; although it be tall, yet are its fides but thin: And 
becaufe again, it fhould grow not only tall and thriftily, but for avoi- 
ding propping up, ftrongly too; therefore, the fame proportion as its 
heigth bears, to the thinnefs of its fides, doth the greatnefs of its Cir- 
cumference alfo ; being fo far dilated asto parallel a Qualit felf. 
25. §. Befides the pofition of the Ligvows Body within the compafg 
ofa Rizg, there are fome Shootings thereof, often ftanding beyond 
the Circumference of the faid Ring, making fometimes a triangular, 
oftner a quadrangular Body of the Truk, To the end, that the Ring, 
being but thin, and not felffufficient, thefe, like Splinters to Bones, 
might add ftrength and ftability to it. i 
26. §. Next, the fecurity and plenty of the sap. For fhould the 
Lignous Body, as it doth in the fmaller Parts of the Root, ftand Central 
here alfo, and fo the Cortical wholly furround it: the greater part of 
the Sap would thus be more immediately expos'd to the Swz.and Aer 5 
and being lodged in a laxe Body, by them continually be prey’d upon, 
and as faft as fupplied to the Trak, be exhaufted. Whereas, the Pith 
ftanding in the Center,the Szptherein being not only moft remote from 
the Aer und Sw, but by the Barque, and efpecially the Wood, being 
alfo furrounded and doubly immurd, will very fecurely and copi- 
oufly be conveyd to all the Collateral Parts, and (as {hall be faid 
how_) thetop of the Trunk, 
27. §. And theSwp by the amplitude, and great porofity of the 
Pith, being herein more copious, its Fermentation alfo will be quicker; 
which we fee in all Liquors,by ftanding in a greater quantity. toge- 
ther, proceeds more kindly: And being tu’d up within the Wood, 
is at the fame time nat only fecur’d from lofs, but all extream.mutati- 
onss the Day being thus, not too hot; nor the Night, too cold for 
if. ‘ 

28. §s. And the Fermentation hereof being quicker, its motion 
alfo will be ftronger, and its Diftribution more effeCtual, not only to 
the dilatation of the Trak, but likewife the fhooting out of the 
Branches. Whence it is, that in the Bodies of Trees, the Barque of it 
felf; though it be’Sappy, and many Fibres of the Lignzows Body mix- 
ed with it, yet feldom fendeth forth any 5 and that in Herbs, thofe 
with the leaft Pith ( other advantages not fupplying this defect_) have 
the feweft or fmalleft Branches, or other collateral Growths: and that 
Corz, which hath no P7th, hath neither any Branches. 
29. §. Laftly, the Advancement of the Sp will hence alfo be 
more ready and fufficient. For the underftanding where, and how, 
we fuppofe, That in all Trw#ks whatfoever there are two Parts joyntly 
hereunto fubfervient. In fome, the Lignzows Body and the Cortical, as 
in older Trunks , the Pith being either excluded, or dried : But in 
moft, principally, the Ligwons Body and Pith 5 as inmoft Annual 
Growths of Trees ; but efpecially Herbs, where the Cortical Body is 
ufiially much and often wholly Inferted: 
30. $3 

