70 The Colours Lea. V, 
2. $. _Firft, Ofthofe feveral Colours, which appear in Plants in th 
Natural Eftate, 
3. $. Secondly, As they appear upon the Infufion of Plants into 
feveral Sorts of Liquors. 
4. $. Thirdly, As upon the Mixture of thofe Infufions, 
one of them with fome other Liguor, or other Body. 
5. $. Asthey appear in the Plants themfelves, it may be obferved 
inthe firft place, That there is a far lefs variety in the Colours of Roots, 
than of the other Parts: the Parenchyma being, within the Skin, ufu- 
ally White, fometimes Yelow, rarely Red. The Canfe hereof being, 
for that they are kept, by the Earth, from a free and open Aer; which 
concurreth with the Juyces of the feveral Parts, to the Produétion of 
their feveral Colours. And therefore the Upper parts of Roots, when 
they happen to ftand naked above the Ground; are often deyed with 
feveral Colours : fo the tops of sorrel Roots will turn Red,thofe of Mul. 
len, Turneps and Radifhes, will turn purple, and many others green, 
Whereas thofe partsof the fame Roots which lie more under Ground, 
aré commonly White, 
6. $. As Roots are moft commonly Whites fo the Leaves, Green, 
Which Colour is fo proper to them, that many Leaves, as thofe of Sage, 
the young sprouts of St. Fohns-wert, and others, which are Redifh 
when in the Bud 5 upon their full Growth, acquire a perfect Green. 
7. 9. The Canfe of this Colour, is the action of the Aer, both from 
within, and from without the Plant, upon the Juyces thereof, where- 
by it ftrikes them into that Colour. 
8. $. By the Aer from without, I mean that which farrounds the 
Body of the Plant : which is the Caufe of its Greenefi, not meerly as 
it is contiguous to. it, but as it penetrates through the Pores of the 
Skin, thercinto 5 and fo mixing with the Juyces thereof, plainly deys 
or ftrikes them into a Green, 
9. §. By the Aer from within, I mean, that which entring, toge- 
ther with the Aliment, at the Root, thence aftends by the ser-Veffels, 
into the Truk and Leaves, and is there transfufed into all the feveral 
Fuyces,thereby likewife concurring to their Yerdure. Whence it is, that 
the Parts of Plants which lie under Water, are Green,as well as thofe 
which ftand above it 5 becaufe, though the ambient 4er, conteined in 
the Water be but little, yet the want of it is compenfated, by that 
which afcends from the Root. 
To. $. And therefore it is obfervable, that the Stalks of Marfh- 
Mallow, and fome other Plants, being cut tranfverfly, though the 
Parenchyma in the Barque be white, yet the Sap-Veffels which lie within 
that Parenchyma, are as Green as the Skin it felf 3 füh becaufe they 
ftand clofe to the Aer-Vefféls. The Parenchyma, Y fay, which is inter- 
cepted from the Aer, without, by the Ski»; and from the Aer within, 
bythe sap Vefels, is white : but the Skin, which is expofed to the Aer 
without, and the Sap-Vefels which are next neighbours to that with- 
in, are both equally Green. So likewife if a Carrot be plucked up, and 
fuffered to lie fometime in the open Aer 5 that part which ftandeth in 
and near the Centre, amongít the Aer-Veffils, will become Green as well 
as the skin, all theother Parts continuing of a Redif Yellow, as before, 
The Aer therefore, both from without, and from within the Plant, to- 
ther with the Fryces of the Plant, are all the concurrent Canfes of its 
Verdure. 11. $ 
or of any 
