
Book I. of Plants. i 

GEEAB dk 

Of the ROOT. 

leg» ANAUNG Examin’d and purfu’d the Degrees of 
7, Vegetation in the Seed, we find its two Lobes have 
é,. here their utmoft period: and, that having conveyed 
% their Seminalities into the Radicleand Plume: thefe 
Z therefore, asthe Root and Trunk of the Plant, ftill 
7 XY) furvive. Of thefe, in their order, we next pro- 
LEY WO ceed to {peaks and firft, of the Root: whereof, as 
well as of the Seed, we muft by Diffection inform our felves. 
2. §. In Diffection of a Root then, we fhall find it with the Ra- 
dicle, asthe Parts of an Old Man with thofe ofa Fetys, fabftantially, 
one. The firft Part occurring is its S&, the Original whereof is 
from the Seed: For that extreme thin Cuticle which is {pread over the 
Lobes of the Seed, and from thence over the Radicle, upon the 
fhooting of the Radicle into a Root, is co-extended, and becomes its 
Skin. : 
3. §. The next Part isthe Cortical Body. Which,when itis thin, : 
is commonly called the Barque. The Original hereof, likewife is 
from the Seed; or the Parenchyma, which is there common both to 
the Lobes and Radicle, being by Vegetation augmented and prolonged 7, 5, ¢ 4: 
intothe Root, the fame becomes the Parenchyma of the Barque. d 
4. §. The Contexture of this Parexchywa may be well illuftrated 
by that of a Sponge, being aBody Porous, Dilative and Pliable. Its 
Pores, as they are innumerable, fo, extream fmall. Thefe Pores are 
not only fufceptive of fo much Moifture as to fill, but alfo to enlarge 
themfelves, and fo to dilate the Cortical Body wherein they are : which 
by the fhriv’ling in thereof, upon its being expos’d to the Air, is alfo 
feen. Inwhich dilatation, many of its Parts becoming more lax and 
diftant, and none of them faffering a folution of their continuity ; “tis 
a Body alfo fufficiently pliable ; that is to fay, a moé# exquilitely fine- 
wrought Sponge. 
§. §. The Extention of thefe Pores is much alike by the length 
and breadth of the Root 5 which from the fhrinking up of the Cortical 
Body, im a piece of a cut Root, by the fame dimenfions, is argu’d. 
6. g. The proportions of this Cortical Body are various < If thin, 
‘tis, as isfaid, calleda Barque; and thought to ferve to no other end, 
than what is vulgarly afcrib’d to a Bargue 5 which is a narrow conceit. 
Ifa Bulky Body, in comparifoa with That within it,*as in the young 
Roots of Cichory, Afbaragus, &c. ‘tis here, becaufe the faireft, there- 
fore taken for the prime Part ; which, though, as to Medicinal ufe, 
it iss yet, asto the private ufe of the Plawt, not.fo. The Colonr 
hereof, though it be originally white, yet in the continued growth of 
the Root, divers Tinures, as yellow in Dock, red in Biftort, are there- 
est : 
into introduced, 



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