f Plants. 
Book I 
30. $. Ofthe Lignoms Body it is fo apparent by its Pores, or ra- 
ther by its Vefels, that we need no farther Evidence. For to what 
end are Vefféls, but for the conveyance of Liquor? And is, that alfo, 
which upon cutting the young Branch of a Sappy Tree or Herb, by 
an accurate and fteady view may be obferved. But when I fay 
the Vefels of the Lignous Body, 1 mean principally them of the 
jounger footings, both thofe which make the zew Ring, and thofe 
which are mixed with the Cortical Body in the Barque : that which 
afcendeth by the Pores or Vefels of the Wood, being probably, be- 
caufe in lef quantity, more in form of a Vapour, than a Liquor. Yet 
that which drenching into the fides of its Pores, is with all thereunto 
fufficient Aliment 5 as we fee Orpine, Onions, Gc. only ftanding in 
. amoyfter Aer will often grow. And being likewife in part fupplied 
by the Infertions from the younger Shoots: But efpecially becaufe as 
it is but little, fo (confidered as Aliment) it ferveth only for the 
growth of the Wood, and no more; whereas, the more copious Ali- 
„ment afcendent by the younger Shoots, fubferves not only their own 
growth, but the generation of others 5 and is befides with that in the 
Cortical Body the Fountain of Perfpirations, which we know even in 
Animals are much more abundant than the Nutritive Parts, and 
doubtlefs in able are {till much more. 
31. §. thefè Pores, although they are a free and open way 
to the afcending sap; yet that meer Pores or Veffels hould be able of 
themfelves to advance the Sup with that fpeed, ftrength and plenty, 
and to that height, as is neceflary, cannot probably be fuppofed. Ic 
follows then, that herein we mutt grant the Pith a joynt fervice. And 
why eife is the Pith in all Primitive Gromths the moft Sappy part, why 
hath it fo great a ftock of sap, if not, after due maturation within it 
felf, fúll to be disburfed into the Fibres of the Lignons Body 2 Why 
are the Annual Gromths of all both Herbs and Trees, with great Piths, 
the quickeft and the Jongeft? But how are the Pores or Bladders 
of the Pith permeable? That they are fo, both from their being ca- 
pable of a repletion with Sap, and of being again wholly emptied of 
uit, and again, inftead thereof fill'd with Aer, is as certain as that they 
are Pores. That they are permeable, by the breadth, a pears from 
the dilatation of the Lignous Body, and from the produdion of Bran- 
ches, as hath been, and fhall hereafter be And how elle is there 
a Communion betwixt This and the Cortical Body? That they are fo 
` alf, by the length, is probable, becanfe by the belt Micrafeope we 
cannot yet obferve, that they are vifibly more open by the breadth, 
than by the length. And withall are ranked by the length, as thofe 
of the Infertions by the breadth of the Truk But if you fet a 
Piece of dry Elder-rith in fome tinged Liquor, why then doth it 
hot penetrate the Pores, fo as to afcend through the Body of the Pith? 
The plain reafon is,becaufe they are all fill’d with Aer. Whereas the Pith 
ina Vegetating Plant, as its Parts or Aladders are ftill generated, they 
are at the fame time alfo fill’d with Sup 5 which, as *is gradually fpent, 
is ftill repaired by more fucceeding, and fo the Aer (till kept out 5 asin 
all Primitive Growths, and the Pith of Elder it felf: Yet the fame Pith, 
by reafon of the following Winter, wanting a more copious and quick 
fupply of Sap,thus once become, ever after keeps dry. And fincein the 
aforefaid Trial the Liquor only afcends by the fides of the Pith, that 
K 2 
is 
