of the V, egetarion Book IL 
(e) Lib. 1. 
OJ Su 14. 
Cd) P.2.$. 
21. 
ees 
that Plant. For befides Water, and Earth, an Alkaline Salt and Ol are, 
as is (aid, the predominant Principles of thefe Vefels. (a) Ie isthen the 
Oyl, chiefly, by which thefe Vefels are Tough for being of a tenacious 
Nature, by taking hold of other Principles, it marries them together; 
and the Alkaline Salt and Earth, concentred with it, addeth to it 
more Strength. Hence the Caput Mortunm of moft Bodies, efpecially 
thofe that abound with Oyl and a sal Alkali, is brittle and friable s 
thofe Principles, which were the Ligaments of the reft, being forced 
away from them. From the fame Caufe, the Parenchymous Parts of a 
Root, even in their Natural State, are brittle and friable; fe. Becaufe 
their Earthy, and efpecially Oleous and Saline Principles are, as is fiid,(Ly 
fo very few. Therefore all Piths and more fimple Parenchyma's, break 
Jhort, fo Corn, and the Roots of Potato's, and divers other Plants, 
being dryed, will eafily be rub'd to Meals and many Apples, after 
Frofts, eat mealy; the Parenchymous Parts of all which, are not only 
by Analogy, but in Subltance or Effence, the flf fame Body. (c) 
31. $. And asthe Confiffence of the feveral Organical Parts, is de- 
pendent on their Principles; fo are their Figures. And firlt, the 
Succiferons Veffels, from their Alkaline Salt, (d) growin Length. For 
by that Dimenfion, chiefly, This Salt always fhoots: And being a lef 
moveable Principle than the ret, and fo apt more fpeedily to fix or 
foot : Tt thus overrules them to its own Figure. And even as the Shape 
of a Button dependeth ongthe Mould, the Silk and other Materials 
wrought upon it, being always conformable thereunto: fo here; the 
salt is, as it were, the Mould; about which, the other more paflive 
Principles gathering themfelves, they all confort and fathion to it, 
Hence alfo the fame Sup-Vefféls arenot pyramidal, asthe Veins of Anis 
mals; but of an equal bore, from end to end; the fhootings of the 
faid Salt, being alfo figured more agreeably to that Dimenfion. And 
as by the Saline Principle, thefe Vefféls are Longs fo by the Oleous, (e) 
they are every where Round, or properly Cylindrical; without fome 
joynt Efficacy of which Principle, the faid Pefels would be Flat, or 
fome way Edged and Angular, as all faline fhoots, of themfelves, are 3 
as thofe of Alum, Vitriol, Sal Ammoniac, Sea Salt, Nitre, &c, And 
becaufe the Spirituous and more Fluid part of the Principles, is leat 
of all apt to fix 5 while therefore, the other parts fix round about, 
This will remain moveable in the Centre 5 from whence every Vefel is 
formed, not into a folid, but hollow Cylinder; thatis, becomes a 
Tube. 
32 6. The Laétifirous Veffels are tubulary, as the Lymphedutts, 
but of a fomewhat wider Concave or Bore. For being their Princi- 
ples are lef Earthy and Oleous, and alfo more loofely Concentred 3 as 
from their eafie corruption or Refolutior by the Aer, it appears they 
are: they are therefore more tender, and fo more eafily dilative, and 
yielding to the faid spirituous part in the Centre. And by this means, 
obtaining a wider Bore, they are more adapted to the free motion of 
the Milky Content: which being an Oleous and Thicker Liquor, than 
that in the Lymphedués 5 and'having no advantage of pulfation, as the 
Blood hath in Animals; might fometimes be apt to ftagnate, if the 
Pefels, through which it moves, were not fomewhat wid 
