94 Of the Vegetation Book IL 
duly Reéfified, will mix as cafily together, as Water and Wine, So 
that, although Oy!, by the feparation of its earthy and Saline parts, 
which give it its fenfibly oleons Body, may not be fo far abtenmated,as to 
produce a spirit 3 yet that it may fo far be attenuated, and fo be mixed 
therewith, as not to be difcerned from it, as in the forementioned Plants, 
will be granted. 
63. $. Hence itis, that the Ladifeross ftanding more remote from 
(a) Tab. 9. the Aer-Veffels, and the succiferows interpofing 5 (a) the Liquor, there- 
& 16, fore, contained in them, isnot fo much under the government of the 
Aerial Ferment, and is thence, partly, more Oily. For the fame rea- 
fon, all Roots which are Milky, fo far as I have obferved, have an un- 
der-proportion of Aer-Peffels 5 thefe being either Fewer or Smaller. 
How the O-, 64. $. FROM what hath been faid, we may receive fome 
dours of information, likewife, of the Odours, Colours, and Taftes of 
Plants axe Plants. And for Odours, I fappofe, That the chief Matter of them, 
mide, ig the Aerial Ferment contained in the Aer-Vefels. Not but that 
the other Parts do alfo yield their fmell ; but that thefe yield the 
Srrongeft and the beft, and immediately perceptible in frefb, undryed and 
unbruifed Plants. “For the Aer entring into, and pafling through the 
Root, and carrying a Tin@ure, from the feveral Organical and Contai- 
ned Parts, along with it , and at laft entring alfo the Concaves of the 
Aer-Veffels; it there exifts the moft Compounded and Volatile Fluid, 
of all others in the Plant, and fo the fitteft matter of Odour : and 
fach an Odour, as anfwers to that of al] the Odorous parts of the 
(h) Pi 2, Plant. (b) Wherefore the Organica! Parts, being well clenfed of their 
24 Contents, fmell not at all; Becaufe the Principles hereof are, as hath 
been faid, fo far fixed and concentred together. Hence alfo the Contained 
Parts themfelves, or any other Bodies, as their Principles are any way 
more fixed, they are lef Odorous : So is Rofin, lef than Turpentine, 
and Pitch, than Tar ; and many the felf fame Bodies, when they are 
coagulated, lefs than when they are melted. So alfo Musk, which is 
not fo liquid as Civet, isnot fo ftrong 5 nor Ambergreece, as Musk = 
For although it hath a more excellent fmell, than Musk hath, yet 
yieldeth it not fo eafily 5 fince it is a more fixed Body, and requireth 
fome Art tobe opened. Hence alfo the Leaves of many Plants lofe 
their Odour upon rubbing: Becaufe the Aer-Vefféls being thereby bro- 
ken, all their contained odorous Fluid vanifheth at once: which be- 
fore, was only ftrained gradually through the Skin. Yet the fixed 
Parts themfelves, upon drying, are fo far altered by the Suz and Aer, 
as to become refoluble, and volatile, and thence odorous. 
How their _ 65- $. SO ALSO of their Colours. As whence the Colours of the 
Cols, Skins are varied. For divers of the Sap-Peffels, together with the 
Parenchymous Parts fucceflively falling off from the Barque into the 
(e) Pat. 02. Skin (c) by their proximity to the Earth and Aer, their Sulphureoms or 
$254 Oleons Principle is more or lef refoleed, and fo produceth divers Co- 
lours. So thofe Roots which turn purple any where within, have 
ufually a blacker skin; the’ one of thofe two Colours being, by a refo- 
lution and corruption of parts, eafily convertible into the other, as 
in Cumfry, Thifile, Exc, So the Milk of Scorzonera, contained in 
the Vefíels of the Barque, upon drying, turneth into a bro, 
