| OCR Text |
Show The VegeraionBookHE 3. . AGAIN, asthe fpecifying of the Sap dependeth chiefly = of the the fpecial Nuture of the Parts: fo partly, upon the Strudure own Whole, ‘Whereby every Part is ftill better accomodated withits Fayce. Thus the Aer-Veféls are neceflary, not only and_barely for : fopply of Aers but alfo by their Number, Size, and Pofition ee the quantity of that Aer, to the government of Nutrition, and the Ge- neration of the Specifick Liquors of every Plant. Which is evident but are from hence, in that they do not follow the size ofthe Plant; oreat and many, in fome fmall Plats; and {mall and few, in fome others that are large. So Vines, and Corn, as we have formerly ob- ferved, have proportionablya great number of Aer-Vefféls, and thofe very large. By which means the Sap 1s attenuated and lefs Oyly, and more copioufly impregnated with a Subtle, Volatile and WinySpirit. 4. §. 133 I fay therefore, that all kinds of Vegetable Principles;. are either in or together with the Water, with lef difference firft received into a Plant. But when theyare once therein ; they are then JSeparated, thatisto fay, filtred, (ome from others, in very different Propor- tions and Conjunttions bythe feveral Parts 5 the Watery by one Part, the Aery by another, the Oyly by another, and fo the reft: and fo every Part is the Receptacle of a Liquor, become peculiar, not by any Trans- formation, but only the Percolation of Parts out of the common Mat or Stock of Sap. And fo all thofe parts of the Sap, which are fuperfious to any kind of Plant, are at the fame time, difCharged back by Perfpirations, into the der. to. §. AND,that Nature, inthe various Percolations and Sepa- tions of the Sap, may ftill the better anfwer her ends hence,it is, that fhe carefully feeth, not only to the fpecial Nature and Proportion of the Organs, by which fhe doth her work ; but likewife to their very Hence alfo it is, that carry a more Watery Liquor, are{till placed on the inner Verge of the Barque, next tothe Aer-Veffels: the Laétiferous and Refiniferous Veffels of Plants, to whofe Oylie Liquor a mixture of much deris incongru- Veffels, to what we fee in moft other Plants. none ofthe {aid Plants have any confiderable Barques that fo the attenuating and fabtilizing Aer, may have a more eafie and plentiful ad- miffion at the Trunk alfo. For which reafon likewife the Pores of | the Skin of fome Caves are, as hath been faid, remarkably wide. 5. §. Hence alfo it is obfervable, that of the fame Species or Kin- dred, thofe Plants which have the moft, and efpecially the largeft AerVeffels; have alfo the greateft abundanceeither of a fweet, or of a winy Liquor. So in Apple, they are larger than in Crab 5 In Warden; larger than in Qvince ; and in Pear-Tree, larger than in Warden. So alfo in Corin, larger than in Gooféberrey; and in Vine, larger than in Corin: andfo in others. 6. §. AND asthe Aer-Vefels, by their Multitude and Largenefs, are accommodated to the better making of a Winy Sap :fo by their femnefs and fumalluefs, of an Oylie. As is remarkably feen in Fir, and other Refiviferous Trees: thefe having, if not the fralleft, yet the feweft Acr-Veffels of all other Trees. : 7. §. IFitbeasked, howa Plant comes to have anyOy! at all in anyPart ? Since we fee, that the Sap by whichthe Rootis fed, feemeth to be nothingelfe but Water: and that many Plants which yield a great deal of ftillatitions Oyl, as Mint, Rue, and others, will yet grow in Water: fay, ifit be enquired how this Water, is made Wine or Oyl? Tanfwer, that there isno fuch matter. But that the Oy/, andall other Vegetable Principles are actually exiftent in, and mixed per mininia, thoughinanextraordinary {mall proportion, with the Water. Even as we fee the diftilled Waters of Avife Seeds, Penyroyal, and the like to be impregnated with their own Oyls, which give the Fa/te and Smell to fuch Waters. i 8. §. 9. §. eal of Trunks. Forthe fame reafon, the Stalk of Maze or of Indian Wheat, which whenit is Green yieldeth a very fweet Zuyce 5 and the Canes, whereof Sugar ( which aboundeth with a volatile and inflammable spirit ) is made ; thefe, Ifay, obtain the like over proportion of Aer- a Seem ae Book IIL Wherefore,as a certain quantity of any Salt may be diflolved in Water ; beyond which, it will not mix therewith, but remains under its own Form: So is there a certain proportion of Oyl,. thoughfar lefs, which mayalfo be perfeétly mixed with Water; and is certainly fo, more or lefs, withall the Water in the world. But if that propor- tion, or degree of impregnation be once exceeded, the particles of Oyl do then, and nottill then, gather intoabody, and appear under their own Form, 9. $- Pofition. Thus it is obfervable, That whereas the Lymphaeduds, which ous 5 do ufually ftand, neither on the inner, nor the outer verge ofthe Barques but in the widle. By which means, they are at the greateft diftance, and fo moft fecure, from the Aer; either that which enters the Barque at the Circumference, or from the Wood and Pith. 11. §. AND becaufe the Refizous Liquors of Plants are more Oily, than their Asilky 5 their fecurity therefore, from the approach of the Aer, is yet further contrived. In that in Pixe, and other Refizons Trees, the Diametral Infertions are never found ; oratleaft, not vifible: which yet in other Trees, are confpicuous 5 being thofe Parts, whofe office it is, to introduce the Aer from the Aer-Vefels into the Barque. 12, §. AGAIN, the Milky Liquors of Plants being thinner than the Refizous, and having a confiderable quantity of Water mixed with their Oyl; henceit is, that in Milky Plants, as in Rhws, there are a greater number of Iympheduéts; and thofe ftanding nearer to the Milky Veffels, than they do in Pine and the like, to the Refizous. By which meansthey are better fitted to affufe their Aqueous Parts more plentifully to the faid Milky Liquor. 13. §. FROM the Mixture of Watery Parts withthe Oglie, it comes to pafs, that whereas all Lympha's, Mucilages, and Rofins are tranfparent 5 the Aque-oleous Liquors of Plants are Milky or white. or otherwife Opacous. For the fame thing is the caufe of the whitenefs of Vegetable, as of Animal-Milk: thatisto fay, a more copious mixture of Watery and Oily Parts per minima, or into oneBody. For even the Serous and Oylie Parts of Animal Milk , when throughly feparated one fromthe other,they become verytranfparent. So theStillatitious Oyl of Anife Seeds, is moft tranfparent and limpid, even as Water it elf: yet there isa knownfort of White Anife-seed Water, asit is commonly called: that it is to fay, wherein the Oy/, in diftillation, arifeth and is mixed more plentifully with the Water. And the Wa- ter, wherein the ftillatitious Oy! of any Vegetable is diffolved, becomes (4) See the a perfect white Milk 5 asin this Honourable and Learned Prefence, 1 Difcourje have formerly had occafion to fhew the Experiment. (4) 14, §hs of Mixture |
