Lea, V. of Phants, 273 
chiefly upon the Salive Principles: and that the Flower hath a = 
rent Figure from that of the Leaf‘: it follows, that there is fome Sulize 
Principle in the one, which is not in the other, efpecially,all in fuch 
Flowersywhote Figures are cut out by a greater Variety and Complication 
of Lines. The Leavs therefore, though varioufly thaped, yet agrecing 
fo far in one common Figure, as ufùaly to be flat; it therefore feemeth 
plain, that there isa Saline Principlein them all, fo far one, as to be the 
chief Caufe of that common Figure: and in concurrence with the asebi- 
ent Aer, to belikewile the chief Canfè of one common Colour, fè.a Green. 
25. $. Whereas the Figure of the Flowers, and therefore their 
Saline Principle, being more various, and commonly diftinét from that 
of the Leaf; it will eafily concur with asa great Variety of Salts in 
the Aer, whether Acid, Alkaline, Nitrous, Urinons, Armoniacal, of 
any other therein exiftent, to the Precipitation of the Sulphur into 
the like Variety of Colours. Thus far of the Colours of Plants as they 
appear in their Natural Eflate. 
CHA Pill 
t la Y 
denn, 
z pen. Of the COLOURS: of Plants by Infufion. 
om. But 
HE next general Inquiry, propofed to be made, was 
this, After what manner the Colours of Plants thew 
themfelves, upon their i#fiffon into Liquors, The Li- 
quors I made ufe of forthis purpofe, were three, Hee 
Oy! of Olives, Water, and spirit of Wine, The Water I 
ufed was from the Thames, becaufe I could not 
~ procure any clear Raiz Water, and had not leafüre 
at prefent to diftill any. But next to this, that yields as little Salt,as any. 
2. $. AsforOyl, it is known, that moft Plants either by Cođion 
or long Infufion, will give it their Green Colour, I have likewife tryed 
fome Yellows, and find they will do indifferently well; as Saffron, 
which, by Infufion in Oyl, gives it a light golden Tindfure. 
3. $. Divers Aromatick Plants, as Mint, Majorane, &c. being 
dryed and infaled in Oy! give it a double Tinéture, both green and yel- 
low 3 one drop of the Oyl (hewingígrees; but a good quantity of it 
held up againft a candle looketh redih or of a deep yelow. 
4. $. But there is no Vegetable yet known which gives a true Red to 
Ol, except Alkanet Root: with which, fome colouring either common 
or other Oyl, vend it under the name of the Red Oyl of Scorpions. 
5. $. Thefe things confirm what we have faid concerning the Can- Difcourfe 
fe of Colowrs in the Leevs and Flowers of Plants, upon this twofold See 
Confideration, First, that Oyl isthe molt proper Mentrum of sul. Oy MAH: 
phur. Secondly, that Oylshavea greater congruity with Acids than ene 
with Alkalies 5 as L have formerly thewed. Teer 
se eh 
