Bock I. of Rios, 85 
to the Centres they hereby carry off a more Copious and Aerial 
Ferment from the One, and communicate it unto the Other, For as 
the Sap enters the Bargue, the more liquid part, (till paffeth into the 
succulent Portions thereof; the more Aery, is feparated into thofe 
White and Dryer Diametral ones ; and in its paflage betwixt the Porti- 
ons of the Aer-Vefféls,is all along communicated to them. Yet is it not a 
pure or fimple Aer,but fuch as carries a Tindfure with it,from the Succife- 
rous Veffels. And therefore it is obfervable, That when the Diametral 
Portions are more diftant, the Sap-Ve/fels run not in a Straight Line be- 
twixt them, but are Reciprocally fo inclined, as to touch upon them; 
asin Lovage is vifible: Thereby communicating their Tinéfure to the 
Aer, as it paffeth by them, through the faid Diametral Portions. 
28. $. By the continual appulf of frefh Sap, fome, both of the 
aery, and of all the other parts thereof are tranfmitted into the Pith 5 
where, finding more room, it will yet more kindly be digesfed. Efpe- 
cially having the advantage herein of fome degree of Warmth ; be- 
ing herein remoter from the soil, and, as it were, Tunn’d up within 
the Wood, or the Mafi of fürrounding Vefels. So thatthe Pith, isa 
Repofitory of better Aliment gradually füpplied to thofe Succiferous 
Veffels, which are frequently {cattered up and down therein, and 
which afcend into the Trank. (4) But where no fucciferous Veffels arc 
mixed, herewith, it ufually becomes Dryer, and is replenifhed witha 
more Aerial and Warmer Sap; whereb’ ge growth of the Caulis is 
promoted,as by an Hot Bed fet juft under®. And in many Plants with 
divers knobbed Roots, the younger are more fucçulent,ferving chiefly 
to feed the Stalk: the Elder are {pongy and fill’d with Aer, for the fer- 
menting of the Sap, and more early growth of the Stalk: as in little 
Celandine, Dogftones and all of that Kindred, And thusall the Parts 
have a fit Aliment provided for their Nowrifhment 
(a) Pır.c5. 
93. 
29. $. IN THIS Nowilbment, the Principles of the Sap are, asis How the fe- 
faid, concentred and locked up one within another : (b) Whence it is, veral Parts 
that the Orgavical Parts, being cleanfed of their Contents, have none of are Nou- 
them any Tafte or Smell, as in the Piths of Plants, Paper and Linen ril’d and 
Cloth is evident. (c) Becaufe till by Digeftion, violent Deftillation, or Form’d. 
fome other way, they are refolved, they cannot a& upon the Organs Oy ae 
o, they ofthofe Senfes. For the fame reafon, they are never tindured, ex- lien $e 
cepting by their Contents : and although, to the bare Eye, they fre- 
quently thew White, yet viewed through a Microfiope, they all appear 
tranfparent, In like manner, asthe Serum of Blood, Whites of Eggs, 
Tendons, Hairs and Horns themfelves are tranfparent, and without 
much Smell or Tafte, their Principles being, in all of them, more er 
lefs concentred : But when ever thefe Principles, are forcibly refolved, 
they are ever varioufly invefted with all thole Qualities. 
30. $. Andas from the Concentration of the Principles, in every 
Organical Part, the {aid Parts do thus far, all agree: So, from the 
Predominion of the Principles of each Part, the reft are controuled, 
not only to a Concentration, but an Ajfimilation allo; whereby, the 
Specifick Differences, of the feveral Organical Parts, are prelerved. 
Hence the fucciferous Veffels are always Tough and very Pliable; for fo 
are all Barques, wherein thefe Veffels abound 5 ‘fo is a Handfal of Flax, 
which isnothing elfe buta heap of the ficciferons Veffels in the Barque of 
that 
