Book II. of Roa a 
ee ct ee 
15. §. In fome Roots, they are Small, and Few 3 as in Ferufalene 
Artichoke 5 in others Small, but Many, asin Horfe-Radifh: in Buglofs, Tab. 11, 14, 
they are Great, but Few in the Vize, Great and Many. So that the '5, 17: 
proportion, which thofe ofa Vive, their Number and Size being taken 
together, bear to thofeof Ferufales Artichoke, may be, at leaft, as Fifty, 
toOne. Ofthe {malleft Kinds, as thofe of Cinquefoyl, Ferufalen Arti 
choke, and the likes It istobe noted, That they are fcarce ever vifible 
in the frefh Slices of thefe Roots 5 but after they have layn by a while,at 
laft, by a good Glas, Clear Light , and {teddy View, are difcerna- 
ble. 
16. §. In fome Roots, the greater of thele Veffels {tand in or next 
the Centre, asin Taraxacum, or Dandelion ; in others next the circum- 
ference, as in Horfe-Radifo. Sometimes each of them is from one end of 
the Root to the other, of a more equal Size, or more Cylindrical, as in 
Marjh-mallow 5 but ufually, they widen, more or iefs, from the Top, 
to the Bottom ofthe Root, as in Thorn-Apple: about the Top of which, 
they are, for the moft part, but of the Sixth, Seventh, and Eighth, 
Magnitude; fome of the Fifth, but none of the Third; but about the 
Bottome, they are moft of the Third, and Fifth: whence itis manifeft, 
That fome of them are, in the manner of Vei#s, fomewhat Pyramidal. 
Yetis it obfervable, That theirampliation proceedeth not towards, but 
from their Original, asin Nerves. 
17. §. Of thefe Veffels Seignior Afalpighi hath obferved 5 Compo- 
nuntur ( faith he ) expoftte fiftule Zona tenui & pellucida, velut argentei 
coloris lamina, parum lata; que, fpiraliter locata, & extremis lateribus 
unita, Tubum, interins G exterius aliquantulum afperue, efficit. : 
18. §. To whofe Obfervation I further add, That the Spiral 
Zone,or Lamina,as he calls it,is not everone Single Piece; but confifteth 
of Two or More round and true Fibres, although ftanding collaterally 
together, yet perfectly diftin@. Neither are thefe Single Fibres 
themfelves flat, like a Zone; but of a rownd forme, like a moft fine 
Thred. According asfewer or more of thefe Fibres happen tobreak off, 
from their Spiral location, together; the Zone is narrower, or broad- 
er: ufually, Narrower inthe Trak, and Broader in the Root. 
19. §. Ofthefe Fibres I alfo Obferve, That they are not Inoftulated 
fide to fide, but are Kait together by other fmaller Fibres 5 thofe be- 
ing, as it were, the Warp, and thefe the Woof of the Aer-Veffels, Yet 
I think the feveral F7bres are not interwoven juft as ina Web 5 but by 
a kind of Stitch, as the feveral Plates or Bredths of a Floor-Mat. A 
clear and elegant fight of thefe Fibres, and of their Intermeftage, by 
{plitting a Vize-Root, ora piece of Oak, may, witha good Gia/s in the 
fidesof their Greater Aer-Veffels, be obtained; having much of the re- 
femblance of Clofe Needle-work, 
20. §. The Spiration of the Fibres of thefe Veffels, may more eafily + 
be obferved in the Tra#k, than in the Root. And better in younger 
Plants, than other. And not fo well by Cutting as by Splitting, or by 
Tearing off fome {mall Piece,through which they ru : their Conforma- 
tion being, by this means, not fpoiled. Yet this way, the Vefels are 
feen, chiefly , Oxre/alued. 
21. g. But in the Leaves and Tender Stalks ofall fuch Plants, as 
fhew, upon breaking, a kind of Doxze or Wool they may be feen 
Refolved and Drawn out, and that fome times even to the naked Eye, - 
Q an 

Tab. 13, 14. 



























