
Book II. of Roots. | 93 
many more into their Body ; but not to fx thems which therefore 
mutt needs, upon admiffion, pafs through into their Cowcave 3 where, 
together with fome other more ffirituows parts, they make an Aitherial 
Fluid. And becanfe fome aqueous or vaporous parts will alfo ftrain 
through with them 3 hence it 1s, that as more and more of thefe enter, 
they by degrees ftill thruft out the zery ones 5 which quitting the more 
fueculent Fibres of the Parenchyma, are forced to betake themfelves 
to the dryer ones, cil. all thofe, whereof the Diametral Portions do 
confift. For the fame reafon the Aery parts being gradually excluded 
the ficculent Fibres of the Barques they are forced to recede and tran 
migrate into thofe ofthe Pith, Andthe Fibres of the Pith themfelves 
being filled, aud the Aery parts ftill forced into them; they at length 
alfo ftrain through the Fzbrés into the Bladders: whense it comes to 
pafs, that while the Bargue is fucculent, the Pith is often times filled 
with der. 
59. §. The Lympheduits being more earthy, Salinous 5 oleous, and (a) P. as 
aqueous, will both admit and copioufly fix the like Principles, as their $. 21. 
proper Aliment, The Water being more perfluent than the reft, will 
therefore ftrain, with a lighter Tizdfwre of them, into their Concave. 
Efpecially the Oleous parts of thefe being rampant, and lefSapt to fix and 
feize the aqueous, upon their entrance, than the falzne. ; 
60.-§. The LaGiferous, appearing to be made, chiefly, by the 
Conftipation of the Parezchymous Parts all round about their Sides 5 
the Liquor conteined in thofé Parts, although it may eafily enough 
be transfufed into the Hollow of thefe Veféls 5 yet feems it not, with 
equal facility, to be refunded thence: So that the ¢hizner and more 
aqueous Portion only, paffing off; the remainder, is, as it were, an 
Oleous Elixyr, or extract, in the form of a Milk, : 
~ 61. §. The Fluid Ferment contained inthe Aer-Vefels, isalfo in 
part, dependent on the Principles of thofe Veféls, being in their per- 
colation tinGured therewith. But becaufé the percolation is not made 
through the Body of the Fibres whereof the Veféls are compofed, but 
only betwixt them; therefore the tranfient Principles more promifcuof 
ly, yet with an over porportion of dryer Particles, pafs into the Con- 
caves of thefe Vefels, and fo are herein all immerfed in a Body of 
Aer. (b) The Fibres themfelves, in the mean time, as thofe of the (4) P. 2. 
Parenchyma, admitting and containing a more Aery and fitherial $. 24. 
Fluid. 
62, §. TheContents are varied, not only by the Nature, but alfo 
the Proportion and Situation of the Parts, whereby the faid Contents 
are with different Facility and Quantity, communicated one toanother, 
Hence it is, partly, that a Vine, or that Corn, hath fo little Oyl: /c. 
Becaufe their Aer-Vefels, in proportion with the other Parts, are fo 
Great arid Numerous: in Corn, the Stalk being alfo very hollow, and fo 
becoming as it were, one Great Aer-Veffel. For the Oily parts of the Sap, 
are fo exceedingly attenuated (c) by the Aery Ferment contained in (¢) P.2.$. 
thefe Vefels; that they are, for the moft part, fo far immerfed in the 25, & 5% 
Spirit, or mixed therewith, asnot, by being collected in any confide- 
rable Body, to be diftinguifhable from it. And the affinity that is be- 
twixt Spirits and Oils, elpecially Eyential, is manifeft : Both are very 
inflammable; Both will burn all away; The Odors, which we call 
the Spirits of Plants, are lodged in their effential Oyls Both, Pe 
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