y Book IL of Roots. = 95 
} 
a à lonr: Wherefore the Skin, in which there are divers of thofe Vef: 
als ls, is of the fume. So both the Milk and Skin of Lovage is of a 
brownith yellow. But Parfep hath a clearer Sap in all its Vefféls, and 
in, a whiter Skin. So Potato” s, being cut traverfe, after fome time out of 
Nan, ground, have divers red fpecks up and down where the Veféls ftand, 
and their shin is accordingly red. 
> 66. $. The reafon, I fay of thefe Colours, is the refolution or re- 
ete. Soration of the Principles of the feveral Parts, chiefly, by the Aer, and 
tofthe a lighter mixture of them confequent thereupon: whereby the Sul 
Me te ‚phureous or Oyly Parts, which were before concentred, are now more 
“au or lefs rampant, difcovering themfelves in divers Colours, according as 
aer, they are diverfly mixed with the other Principles. Hence thefe Co: 
lours are obfervable, according to the nature of the Parts wherein 
they are, or whereunto they are adjacent : So where the Lympheduits 
doe run, there is a Red, or fome other Sulphureons Colour’; the Ole- 
ous Principles being, as is faid, (a) more copious in thefe Pefels; as(a) B zi 
in the Bark of Peony, the inward parts of Potato’s, &c. may be 521 
feen. But the Parenchymous Parts, where more remote from the faid 
Voffels, they are ufually White, or but Yellow: the Sulphureous Prin- 
ciple of thefe Parts, being, as hath been faid, but fparing. (6) The (Ch) P. 2: 
fame is {een in thofe Roots which fhew both Red and Yellow: thofe $. 20, 
Parts, principally, where the Succiferons Voffels run, being Red; but 
thofe Parts, where only the 4er-Veffels are mixed with the Parenchy- 
mous, being Yellow ; as in Patience. So likewife the pithy part of a 
Carrot, where the Aer-Vefels have very few Succiferous mixed with 
them, is Yellow 5 but the Barque, where the Succiférons are very mu: 
merous, is Red. For the fame reafon, many Roots, which are 
Whiter in their upper parts, are Purple or Reddifh in their infe- 
riour, as Avens, Strawberry, &c. Becaufe thofe lower parts, havin, 
Jain longer (e) under ground (thefe being deftending Roots X their Ce) È. ii 
Principles are, thereby, fomewhat more refolved, and fo the Oleous, ramp $. 13. 
and fpread all over the reft in that Colour, 
67. $. And that the Refolution of the Sulphureous and other Prin- 
ciples is partly effected by the Aer, appears, In that, where the 4er 
hath a free acceß to the Sueciferous Vefels, the Colours are there, 
chiefly produced, or ate more confpicuous. So in ‚Potato’s, where 
the Succiferons Veffels are either next to the external Aer, as in the 
Skins or contiguous with the Aer-Vefels, as in the Ring within the 
Barque 5 there, they produce a Red : but where more remote from 
both, asin the middle of the Barque, and Centre of the Root, 
there they produce none. Hence alfo it is, that the Leaves and 
Flowers of fome Plants, as Bloodwort, Wood-Sorrel, Radifh, Faced, 
&c. although Green or White in the greateft portion of their Pa- 
venchymous Part 5 yet where the Succifétous and Acr-Vefféls run to- 
gether, they are of Red, Bine, and other Colours ; the Oleous parts 
Of the one, being unlocked and opened, by the aery of the other. 
68. $. AND LASTLY, of their Tafts. Moft Roots which are How theif 
acres Or bitting, have a very copious Parenchyma in proportion with Taftes, 
the Succiferons Veféls, as of Arum, Dragon, and others: Becaufe the 
Saline and other Principles are not fo much hot, by any füfficiene 
quantity of Sulphureons, from thofe Vefels, in which the Sulphur, $ 
as is faid, is more abundant; (a) but tendred rather pungent, from DE Cde 
foime” 
