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Show The (olours ‘Lea. V. s. Firf?, What was {aid before, is to be remembred, that here s not a folitary, but concurrent Ca#fe. So that befides the Efficacy ofthis, we are to ider that of thefeveral parts of the Plant, 1 the Contents both Aereal and Liquid are fupplied to the : in the Lywphaduds of a Plant, Sulphur is and much more abounding thanin anyother hath been formerly fhewed. dly, That it apr scording to what we have obferved 5 > Flower, the quantity of Lympheduds with refpec to th r/sis greater in the FYowerthan in the Leaf. 90. §, It femeth therefore, that the Aer-Ve/fels, and therefore the Aer, being predominant in the Leaf; Greev, is therein alfo the predo- dominant Colour. 1 fay predominant, becaufe there are other Colours lye vailed under the Greew, even in the Leafe, as will hereafter appear more manifeft. or. §. Onthecontrary, the Lympheduds, and therefore the szlh i the Aer-Veffels and therefore the Aer, lef, in } Leaf the ambient Aer alone is not able to conyr fo far, but that it generally carrys the greateft port ion of the Colour. Yet in different degrees; For if etwixt the Lymphedudls and the Aer-Veffels be more s either White or elfe Leow, whichlatter Colour is toa Green. If the Sulphur be fomewhat predominant, ll thew it felf Red at firft; but the ambient Aer hath fo ch power upon it, as gradually toturn the Redinto a Blew. But phur be much predominant, then the Acid of the ambient Aer will heighten it to a fixed Red. Led.V. chiefly upon the Selive Principles: and that the Flower hath a different Figzre from that ofthe Leaf: it follows, that there is fome Saline Principle in the one, which is not int the other,efpecially,all in fach Flowers,whote Figures are cut out by a greater Variety and Complication ofLines. The Leavs therefore, thoughvarioufly fhaped, yet agreeing fo far in one common Figure, as ufualy to be flats it therefore feemeth plain, that there is a Saline Principle in them all, fo far ove, as to be the chief Caufe of that common Figure: and in concurrence with the avbient Aer, to be likewile the chiefCanfé of one commion Colour, fe.a Green. 25. §. Whereas the Figure of the Flowers, and therefore their Saline Principle, being more various, and commonlydiftinét from that of the Leafit will eafily concur with asa great Variety of Salts in the Aer, whether Acid, Alkaline, Nitrous, Urinous, Armoniacal, ov 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. CHASE Blew. \conclude therefore, that one Principal Canfe of the Variety of ‘olours in the Flower, is the over proportion of the Lympheduits to Aer-Veffels, and therefore the dominion of the Sulphur over the il ns Ifit be objected, that the Aer doth not deepen, but highten the Colour of the Blood: L anfwer, Firf?, That I am not now fpeaking of Animal, but of Vegetable Bodies ; the fame Aer which hightens the Colour of Blood one way, may deepen that of a Flower, another: nay and may highten that of fome Flowers too, fome other way. §. And therefore, Secondly, it is to be confidered, That as not one only, but divers Saline Principles in the Aer fo are fo in the feveral Parts of one Plant 3 as in the Root,of one fort 5 Leavs, of another ; inthe Flower, of another; and fo in the er Parts, Forfince the Figwration of the Parts of a Plant xp chiefly IE Of the COLOURS of Plants by Infufion. AH E next general Lzquiry, propofed to be made, was f, this, After what manner the Colours of Plants thew 22. §. Henceit is, that Ye/ows and Greens are lefsalterable, upon he drying of Plants than other Colours 5 fe. Becaufe the Aer being pre7 P. mv, they are the lefs lyable to fuffer from it afterwards. Whereas Reds and Purples, in the Produdfion whereof Sulpkuris predominant, are very changeable. Sothe Red Flowers of Lyfimachia, wpon drying, turn Purple, and the young purple Flowers of glofs turn Blew. Solikewife the Purple of Bilberries, and the Crim(on of baked Damajcens, both turn Blew. For being gathered, and fo wanting a continued fupply of frefh Su/phur, to bear up the Colour againft the force of the Aer; it ftrikes it down at laft from Red to Purple or of Plants, themfelves, upon their fifox into Liquors. The Liquors I made ufe offor this purpofe, were three, /c. Oy] ofOlives, Water,and Spirit of Wine, The Water 1 ufed was from the Thames, becaufe I could not ' procure any clear Raiz Water, and had notleafure at prefent to diftill any. But next to this, that yields as little Sait,as any: 2. §. AsforOyl, it is known, that moft Plants either by Cotfioz or long Infifion, will give it their Green Colour. I have likewife tryed fome Yellows, and find they will do indifferently well; as Saffron, which, by Jufufioz in Oyl, givesit a light golden Tinéfure. 3. §. Divers Aromatich Plants, as Mint, Majorane, &c. being dryed and infufed in Oy! give it a double Tizcfure, both green and yellow 3 one drop ofthe Oyl fhewing greez; but a good quantity ofit held up again{ft a candle looketh redifh or of a deep yellow. 4. §. But there is no Vegetable yet known which gives a true Red to Oyl, except Alkanet Root: with which, fome colouring either common orother Oy/, vend it under the name of the Red Oyl of Scorpions. 5. §. Thefe things confirm what we havefaid concerning the Can- Difcourfe fes of Colours in the Leavs and Flowers of Plants, upon this twofold Confideration. Firs#, that Oylis the moft proper MenStranmof sul- Ch Int phur, Secondly, that Oyls havea greater congruity with Acids than 2. §.3. & with Alkalies 3 asi have formerly thewed. sf ee Inft. 5. |