76 
The Anatomy Book IL ` 
Tab9,& 15. 
5. $. Fromhence, it alfo appears, That the Pith is of the fame 
Subftantial Nature with the Parenchyma of the Barque, and with the 
Diametral Portions ; and that therefore they are all one body, differs 
ing in no Effential Property, but only in their Shape and Place. The 
fame is alfo evident from the Continuity of the Pith with the Diame- 
tral Portions, as of Thefe, with the faid Parenchyma. And from 
their Contexture, which, by a Microfcope, appeareth to be of one 
and the fame general kind, in all Plants, both in the Parenchyma of 
the Barque, in the Infertment or Diametral Portions, and in the Pith, 
all being made up of Bladders. 
6. $. The Bladders of the Pith, are of very different Sizes 5 fel- 
dom lef, than in the Barque, as in Afparaguss ufually much bigger, 
as in Horfe-Radi(h. They may be well reckoned to about fifteen or 
twenty degrees; thofe in Jerufalem Artichoke, of the largeft 5 in Va- 
Ierian, Horfé-Radifb, of the meaner; in Biftort, Peony, of the fmal- 
left. Their Pofition is rarely varied, as it is oftentimes, in the Barque 5 
but more uniform, and in the tranfverfe Cut, equally refpe&ive to all 
parrs of the Root: yet being piled evenly, one over another, in the 
long cut, they feem to run, in Dire Trains, by the length of the 
Root. Their Shape alfo is, ufüally more orbicular; but fometimes, 
fomewhat angular, in the larger kinds, as in Jerufalem Artichoke. 
7. $- THUS FAR the Contexture of the Pith is well difcoverable 
in the Root. In the Trunk, farther, and more eafily. -Whereof 
therefore, in the next Book, I fhal] give a more particular Deferiptior 
and Dranght. Yet fince I am {peaking of it, I fhall not wholly omit 
here toobferve, That the sides, by which the aforefaid Bladders of 
the Pith are circumferibed, arenot meer Paper-Skims, or rude Mem- 
branes; but fo many feveral Ranks or Piles of exceeding fmall Fi- 
brous Thredss lying, for the moft part, evenly one over another, 
from the bottom to the top of every Bladder; and running croß, 
as the Threds in the Weavers Warp, from one Bladder to another. 
Which is to fay, That the Pith isnothing elfe but a Rete mirabile, or 
an Infinite Number of Fibres exquifitely finall, and admirably Com- 
plicated together: as by cutting the Pith with a Razor, and fo view- 
ing it with a good Glaj, may be feen. See the Figures belonging to 
the Third Book, 
8. $. All Plants exhibit this Speétable, not alike diftin@y 5 thofe 
belt, with the largelt Bladders. Nor the fame Pith, in any condition 5 
but belt, when dry : Becaufe then, the Sup being voided, the fpaces 
betwixt the Fibrous Threds, and fo the Threds themfelves, are more di- 
ftindtly difcernable. Yet is it not to be dryed, after Cutting; Becaufe 
its feveral parts, will thereupon coincide and become deformed. But to 
be chofen, while the Plazt is yet growing 5 at which time, it may be 
often found dry, yet undeformed 5 as in the Trunks of Common Thiftle, 
Jerufalem Artichoke, Esc. 
9. $. Neither are thefe Threds, fo far as I can obferve, Single Fi- 
bires 3 but ufually, confift of feveral together. Nor are they fmply 
Collateral, but by the weftage of other Fibres, in their natural Éftace, 
knit togethers much after the fame manner as the Spiral Fibres of the 
Aer 
