
























































76 

Tab.9,& 15. 
Tab. 115 
The Anatomy Book IL 

5. §. Fromhence, it alfo appears, That the Pzth is of the fame 
Subftantial Nature with the Parexchyma of the Barque, and with the 
Diametral Portions 5 and that therefore they are all one body, differ- 
ingin no Effential Property, but only in their Shape and Place. The 
fame is aMo evident from the Continuity of the Pith with the Diame- 
tral Portions, as of Thefe, with the faid Parenchywa. And from 
their Contexture, which, by a Microfcope, appeareth to be of one 
and. the fame general kind, in all Plavts, both in the Parenchyma of - 
the Bargue, 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  {el- 
dom lefs, than in the Barque, as in Afparagus; ufually much bigger, 
asin Horfe-Radi(h. They may be well reckoned to about fifteen or 
twenty degrees; thofe in ferufalem Artichoke, of the largeft ; in Va- 
lerian, Horfe-Radifh, of the meaner; in Biffort, Peony, of the fmal- 
left. Their Pofition is rarely varied, as it is oftentimes, in the Barque 
but more uniform, and in the tranfverfe Cut, equally refpective 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, uftally more orbicular; but fometimes, 
fomewhat angular, inthe larger kinds, as in Ferufalem Artichoke. 
7. §. THUS FAR the Contexture of the P7th is well difcoverable 
in the Root. In the Trunk, farther, and more eafily. Whereof 
therefore, in the next Book, I (hall give a more particular De/cription 
and Draught. Yet fince I am fpeaking of it, I fhall not wholly omit 
here toobferve, That the Sides, by which the aforefaid Bladders of 
the Péth.are circumf{cribed, arenot meer Paper-Skivs, or rude Mew- 
branes but fo many feveral Ranks or Piles of exceeding fmall F2- 
brous Thredss \ying, for the moft part, evenly one over another, 
from the bottom to the top of every Bladder; and running crofs, 
as the Threds in the Weavers Warp, from one Bladder to another. 
Which is to fay, That the Pith isnothing elfe but a Rete zirabile, or 
an Infinite Number of Fibres exquifitely fmall, and admirably Com- 
plicated together: as by cutting the Pith with a Razor, and {o view- 
ing it with a good Gla/s, may be feen. See the Figures belonging to 
the Third Book. 
8. §. All Plants exhibit this Spectable, not alike diftin@y ; thofe 
beft, with the largeft Bladders. Nor the fame Pith, in any condition 5 
but beft, when dry : Becaufe then, ‘the Sap being voided, the {paces 
betwixt the Fibrous Threds, and fo the Threds them{elves, are more di- 
ftincly difcernable. « Yet is it not to be dryed, after Cutting 5 Becaufe 
its feveral parts, will thereupon coincide and become deformed. But to 
be chofen, while the Plawt is yet growing 5 at which time, it may bé 
often found dry, yet undeformed 5 as in the Trunks of Common Thiftle, 
Ferufalen Artichoke, &c. 
g. § Neither are thefe Threds, fo far asI can obferve, Single Fi- 
bires 5 but ufually, confift of feveral together. Nor are they fply 
Collateral, but by the weftage of other Frbres, in their natural Eftate, 
knit togethers much after the fame manner as the Spiral Fibres of 
Aer= 

