‘jae ce), Sh eR eS ee nr 
Book IL. of Roots. 87 

33. §. Asthe Saline Principleisthe Mould of the Succiferous, fo 
is the Aerial of the Aer-Veffels. (a) Now the Particles of Aer ftriGly fo (2) P.ric.4; 
called, at leaft of that part of it concerned inthe Generation of the 9: 23-& Piz: 
Aer-Veffeis, I fappofe, are crooked: and that by compofition of many **?4 
of thofe crooked ones together, fome of them become Spiral, or of 
fome other winding Figure: and that thereupon dependeth the Elz- 
tick Property of the Aer, or its being capable of Rarefaclion and 
Condenfation by force. Wherefore, the faid crooked Particles of the 
Aer, firlt footing and fetting together, as the Mould, the other Prins 
ciple cling and ix conformably round about them, So that, as by 
force of the Saline Principles, the re{t of them are made to fooot out 
in Long continued Fibres 3 fo by force of the Aerial, thofe Fibers are 
{till difpofed into spiral Lives, thus making up the Aer-Vefels. And 
according as there are fewer of thefe Aerial Particles, in proportion to 
the Saline, the Concave of the Aer-Veffils is varioufly wider,or the Fi- 
bres continue their fhooting by wider Rings; as thofe that come nearer 
to aright Live, and fo are morecomplient to the Figure and fhooting 
of the Same parts. And whereas the Lympheduits, {hooting out o1- 
ly in length, arenever fenfibly amplified beyond their original fize: 
Thefé, onthe contrary, always, more or lefs, enlarge their Diameter 5 
‘becaufe their Fibres, being difpofed into Spiral Lines, mutt needs 
therefore, as they continue their growth, be fiill dilated into greater 
and greater Rizgs, And being at the bottom of the Rost more re- 
mote from the Aer, and fo having fomewhat féwer Particles purely 
Aerial, there ingredient to them, then at the top; they fall more un- 
der the government of the Saline, and fo come nearer to a right Line, 
that is into greater Circles; and fo the Acr-Vefféls; made up of thofe 
Circles, are there generally wider. (b) Cb) Parad 
34. §. By mediation of their Principles, the Parenchymous Parts $.16. 
likewife yof a Root have their proper Covtexture. For from their A- 
cid Salt they are Fibrous; from their Oyl, the Fibres are Round; and 
in all parts even within themfelves 5 and from their spirit, it is moft 
probable, that they are alfo hollow. But becaufe the spirit is, here, 
more copious than the Aer; and the Saline Principle an Acid, (c) (c) $.19. 
and fo, more under the government of the Spirit, than is an Alkali s 
thercfore are not the faid Fibres continued in ftraight Lines, as the 
Szp-Pefféls 5 or by one uniform motion, into /piral lines, as the Fibres 
in the Aerial but winding; ina circular manner, to and fro a thou- 
Jand ways, agreeable to the like motions of the spirit, that moft aéfive, 
and here molt predominant Principle. And the Spirituous Parts being, 
as is faid, here more copious and redundant, they will not only fuf- 
fice to fill up the Concaves of the Fibres, but will alfo gather toge- 
ther into innumerable little fpaces, without them: whence the Fi- 
bres cannot wind clofe together, as Thred, ina Bottow of Yarn 5 but 
are forced to keep at fome diftance, one parcel from another, and 
fo are difpofed, as Bread is in baking, into Bladders. (d) (ad) P.1.0.33 
35. §. * And the under Fibres being fet firft, as the Warp, the jpi- §, 4. 
rituous parts next adjacent,.willincline alfoto fix, and fo govern an 
over work of Fibres, wrapping, as the Woof, in {till {maller Circles 
round the other: whereby they are all knit together, (e) For the (e) Pat-c5o 
fame reafon, the Lympheduédfs, being firft formed, the Parenchyons CPP ne 
Fibres fet and wrap about. Thefe alfo: (f) And the Aer-Veffels being §. 12. 
formed : 






















































