

Let. V. of Plants. 27 
chiefly upon the Swline Principles: and that the Flower hath a diffe- 
rent Figure from that of the Leaf: it follows, that there is fome Saline 
Principle in the one, which is not in the other, efpecially,all in {uch 
Flowers,whote Figures are cut out by a greater Variety and Complication 
of Lines. ~The Leaus therefore, though varioufly fhaped, yet agrecing 
fo far in one common Figure, as ufualy to be flat 5 it therefore feemeth 
plain, that there is a Salive Principlein them all, fo far ove, as to be the 
chief Caz/e of that common Figure: and in concurrence with the awbi- 
ent Aer, to be likewife the chief Cau/é of one common Colour; fe. a Greez. 
25. §. Whereas the Figure of the Flowers, and therefore their 
Saline Principle, being more various, and commonly diftiné from that 
of the Leaf; it will eafily concur with asa great Variety of Salts in 
the Aer, whether Acid, Alkaline, Nitrous, OUrinous, Armoniacal, or 
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 Eftate, 



CH A Panik 
Of the COLOURS of Plants by Infufion. 
2H E next general Izquiry, propofed to be made, was 
» this, After what manner the Colours of Plants thew 
i themfelves, upon their zxfufion into Liquors. The Li- 
+ quors L made ufe of for this purpofe, were three, /c. 
E Oy! of Olives, Water,and Spirit of Wine. The Water t 
Z ® ufed was from the Thames, becanfe I could not 
tot NG ~. procure any clear Raiz Water, and had not leafure 
at prefent to diftill any. But next to this, that yields as little Sa/t,as any. 
2. g. AsforOyl, itis known, that moft Plants either by Coéfox 
or long Infufion, will give it their Greez Colour. I have likewife tryed 
fome Yellows, and find they willdo indifferently well; as Saffron, 
which, by Jnfufion in Oyl, gives it a light golden Tiwdéure. 
3. §. Divers Aromatick Plants, as Mint, Majorane, &c. being 
dryed and infufed in Oy! give it a double Tizéure, both green and yel- 
low 5 one drop of the Oyl thewing greez; but a good quantity of it 
held up againf{t a candle looketh redifh or of a deep jeLow. 
4. §. But there is no Vegetable yet known which gives a true Red to 
Oyl, except Alkanet Root: with which, fome colouring cither 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 Caz Difeourfe 
fes of Colours in the Leavs and Flowers of Plants, upon this twofold Ge agyture 
Confideration. Fars#, that Oylis the moft proper Menstrunm of Sul- op, Int. 
phur. Secondly, that Oyls havea greater congruity with Acids than 5 § mes 
with Alkalies 5 as’ have formerly ‘fhewed. Inft 5. 
Sf Gis 














































