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(4) Tab. 9. 
& 16. 
How the O- 
dours of 
Plants - aye 
made, 
(b)P.. 2. 
$24, 
How theit 
Colours. 
(c)P.t.2. 
$. 254e 

Of the Vi egetation Book II 
duly Rectified, will mix as eafily 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 attexuated,as to 
produce a Spirit s yet that it may fofar be attenuated, and fo be mixed 
therewith, as not to be difierned frou it, as im the forementioned Plants, 
will be granted. ' 
63. §. Hence itis, that the Leéfiferow ftanding mofe remote from 
the Aer-Vefféls, and the succiferows interpofing 5 (a) the Liquor, there- 
fore, contained in them, isnot fo much under the government of the 
Aerial Ferment, and is thence, partly, more Oil. For the fame rea- 
fon, all Roots which are Milky, {0 far as 1 have obférved, have an un- 
der-proportion of Aer-Veffels s thefe being either Fewer or Smaller. 

64. §. FROM what hath been faid, we may receive fome 
information, likewife, of the Odours, Colours, and Taffes _of 
Plants. And for Odours, I fappofe, That the chief Matter of them, 
is the Aerial Ferment contained in the Aer-Vejels. Not but that 
the other Parts do ‘alfo yield their fmell ; but that the/e yield the 
frrongeft and the bef, and inediately perceptible in frefh, undryed and 
uabruifed Plants. For the Aer entring into, and pafling through the 
Root, and carrying a Tinéure, from the feveral Organical and Contai- 
ned Parts, along with it , and at laft entring alfo the Coxcaves of the 
Aer-Veffels , it there exifts the moft Componnded and Volatile Fluid, 
of all others in the Plant, and fo the fitteft matter of Odour : and 
fuch an Odour, as anfwers to that of all the Odorous parts of the 
Plant. (b) Wherefore the Organical Parts, being well clenfed of their 
Contents, {mell not at alls 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 le{s Odorous : So is Rofiz, lefS than Turpentine, 
and Péch, than Tar; and many the felf fame Bodies, when they are 
coagulated, \efsthan when they are melted. So alfo Musk, which is 
not fo liquid as C7vet, isnot fo ftrong ; nor Ambergreece, as Musk : 
For although it hath a more excellent fimell, than Mush hath; yet 
yieldeth it not fo eafily 5 fince it isa more fixed Body, and requireth 
fome Art tobe opened. Hence alfo the Leaves of many Plants lofe 
their Odour upon rubbing: Becaufe the Aer-Vejfels being thereby bro- 
ken, all their contained odorous Fluid. vanifheth at once: which be- 
fore, was only ftrained gradually through the Sh. Yet the Jixed 
Parts themfelves, upon drying, are fo far altered by the Suz and Aer, 
as to become refoluble, and volatile, and thence odorous. 
65. §. SO ALSO of their Colours. » As whence the Colours of the 
Skins are varied, For divers of the Sap-Feffels, together with the 
Parenchymous Parts fucceflively falling off from the Barque into the 
Skiz (c) by their proximity to the Earth and Aer, their Sulphureous or 
Oleous Principle is more or lefs refolued, and fo preduceth divers Co- 
Tours. So thofe Roots which turn purple any where within, have 
ufually a blacker skiv; the one of thofe two Colours being, by a refo- 
lution and corruption of parts, eafily convertible into the other, ‘as 
in Cumfry, Thiftle, &c, So the Milk of Scorzonera, contained in 
the Veffels of the Bargue, upon drying, turneth into a brown Co- 
: lour < 

