

Book IL of Roots: 95 ? 
PO ee ey ee Ree re ee 
Jour: Wherefore the skiz, in which there are divers of thofe Vef 
fels, 38 of the fame. So both the Milk and Ski» of Lovage is ofa 
brownifh yellow. But Parfzep hath a clearer Sap in all its Yeffls, and 
a whiter Skiz. So Potato’ s, being cut traverfe, after fome time out of 
ground, have divers red {pecks up and down where the Vefels {tand; 
and their shiz is accordingly red. 50) 
66. $.. The reafon, I fay of thefé Colours, is the refelution ‘or re- 
feratiow of the: Principles of the feveral Parts, chiefly; by the Aer, and 
a lighter mixture of them confequent thereupon: whereby’ the Swit 
phureows or Oyly Parts, which were before concentred, are now more 
or lefs rampant, difcovering themfelves in divers Colours, according as 
they are diverfly mixed with the other Principles. Hence thefe Co- 
fours are obfervable, according to the nature of the Parts wherein 
they are, or whereunto they are adjacent : So where the Lympheduct+ 
doe run, there isa Red, or fome other Sa/phureons Colour 5 the Ole- 
ous Principles being, as is faid, (a) more copious im thefe Veffelss as C2 F. 
in the Bark of Peony, the inward parts of Potato’s, &e. may be °*7! 
feen. But the Psrezchymous Parts, where more remote from the {aid 
Vefels, they are ufually White, or but Yellow: the Sulphureous Print 
ciple of thele Parts, being, as hath been faid, but fparing. (b) The cp) P. 
fame is feen in thofe Roots which fhew both Red and Yellow: thof §. 26. 
Parts, principally, where the Sueciferous Vefels run, being Red} but 
thofe Parts, whereonly the 4er-Veffels are mixed with the Parenchy- 
mons, being Yellow, as in Patience. So likewife the pithy part of a 
Carrot; where the -Aer-Veféls have very few Suceiferous mixed with 
them, is Yellow; but the Bargue, where the Succiférous ate very nu- 
merous, is Red. For\the fame reafon, many Roots , which are 
Whiter in their upper parts, are Purple or Reddifb in their infe- 
riour, as Aven, Strawberry, &e. Becaufe thofe lower parts, having 
lain longer (¢) under ground (thefe being defending Roots) their (c) P. 1: 
Principles are, thereby; fomewhat more refolued; and fo the Oleons, ramp §. 13. 
and fpread all over the reft in that Colour. 
67. g. And that the Refolution. of the Sulpbureous and other Prin- 
ciples 1s partly effected by the Aer, appears, In that, where the 4er 
hath a free accef§ to the Sweciferous Veffels, the Colours are there, 
chiefly produced, or dre more ‘confpicuous. So in Potdto’s, where 
the saceiferous Veffels are either next to the external Aer, as in the 
Skin or contiguous with the Aer-Vefels, as in the Ring within the 
Barque 3 there, they produce a Red: but where more remote from 
both, asin the middle of the Bargue, 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, Facea, 
&c.: although Green or white in the greateft portion of their Pa- 
renchymous Part 3 yet where the Sueciferous and Aer-Veffels ran to- 
gether, they are of Red, Blve, and other Colours 5 the Oleous parts 
of the ove, being wnlocked and opened; by the aery of the other. ; 
§8. g. AND LASTLY , of their Tafts. Moft Roots which are How theis 
acres or bitting, have a very copious Parexchyma in proportion with Zafes. 
the Succiferous Veffels, as of Arum, Dragon, and others: Becaufethe 
Saline and other Principles are not fo much hot, by any fofficient 
quantity of sulphureous, from thofe Vefels, in which the Sulphur, 
Bu acne PL 23 
as is faid, ismore abundant; (2) but rendred rather pungent, ae oe 
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