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Show The Anatomy 62 _Book HL. ee Rings, which the precedent year compofed the Cortical Body of the Root : bat by the Generation of anew Ring, next the Wood, is now thruft off and fhrunk up intoa Ski, Soalfointhe Roots of Buglofs Fab. 14, 15+ and Horfe-Radifh, as far as the Bladders in the former, and the Fe/els in the latter are Radiated ; the Cortical Body feems either annually or oftener, to fhrink up into another new Shiv, as, the old onesfalloff. And fometimes, perhaps, as in Asfparagus, the whole body of the Perpendicular Roots, except the woody Fibre in the Centre, becomes the Book IL of Roots: termiflion of the preffures the faid Vefels then dilating themfélves by aMotionof Reftitution, and fo fucking up the Sap again. ‘ 7. §. Hereunto may be added the Teltimony offight; the very Veffels them{elves, in many Roots, coming under an apparent view, and {tanding in the utmoft furface of the Root all round about, as in that of Liquirifh, Columbine, Scorzonera, and others. _Which Experiments, I have here, oncefor all, moreparticularly fet down; becaufe I fhall have occafion, hereafter, to refer to them. fecond skix. So that the wearing away ofthe old Skin, fucceeds the derivation of the new one; as in Defcending Roots, the Confumption of the Lower Parts, doth the Generation of the Upper. Becaufe the Bargue fwells, and grows fometimes fafter than the Skim can fall off, or give wayto it : therefore are the Roofs of many Herbs, Barquebound, as well asthe Trunks of Trees. 3. §. This Skiz is ufually, if not always, compounded of two CHAP. IL Of the BARQUE. Kinds of Bodies : whichalfo is probable of the Coétaneous. The one, Parenchymous, and frequently conftruéted of exceeding little Cells or Bladders ; which in fome Roots, as of Afparagns, cut traverfe, and viewed through a Micro/cope, are plainly vifible. Thefe Bladders are of different Sizes; in Buglos, larger 5 in Afparagus lef, and fometimes “EXT WITHIN the Szlieth the Barque, A» “Tis fometimes Yellow, asin Dock; Red, in Biftort ; “9 but ufually, and in seed-Roots, 1 think, always they coincide and difappear. But in thefe, and all other Roots, even where thefe Bladders appear not, the Parenchyma of the Skin, is of the fame Subftantial Nature, with that other more vivid and bulky one of the Bark: As is manifeft, from its being thence Originated 5 and alike Conformed,as fhall be feen; and not only adjacenttoit, as a Glove is to the Hand ; but continuous therewith, as the parts of a piece of flefh, are one with another. 4. §. OF THIS Parenchymous Body, the skin confifteth chiefly, but not ‘wholly 5 there being many Ligvous Veffels which are Fubulary, mixed therewith: which, though hardly by the Microfcope, yet otherwife, is demonftrable. For in tearing the Sk, you fhall do it more eafily by the length, than bredth 5 becaufe, by thefirft way, the continuity only of the Parenchyma, is diflolved , but by the latter, both ofthis, and of the Veffels, thefe being pofited by the length of the Root : Sothat, as by the {malnefs of the Bladders of the Parenchyma, the Skits Denfe 5 fo by thefe Vefels, is it Tough. . §. Again, if you cut a Root traverfe, and let it lie by for fome time,all the parts,where there are no Vefels,fhrink below the furface of the cut-end 3 but where-ever Thefé are pofited, there is no fhrinking 5 which oftentimes, evidently appears alfo in the Skéz : becaufe the faid Veffels, though, as the Bladders, they may coincide; yet they cannot vifibly fhorten or fhrink up in length ; no more than a Straw, whofe fides may yet be eafily crufhed together. 6. §. Further, the Root being cut traverfe, if, near the cut-end, youvery gently prefs the fide of the Root with the edge of your Nail, the Sap will thereupon arife fometimes from the shin ; in the fame manner, as from any other part of the Root, where thelike Vefels are pofited. And although the Sap may likewife be expreffed from the Pith, and other Parts where fometimes, there are none ofthefe Veffels ; yet not withouta folution of there continuity ; which here doth not foltow 5 as appears, from the difappearing of the Sap, together with the intermiffion White. w ter of the It is derived from the Seed it felf; being but the extenfion or prolongation of the Parenchyma of the Radicles; One of the three. Organical Parts of the Seed, defcribed in the Firi# Chap. Fir? ‘ook. 2. § It is varioufly Sized 5 fometimes very Thin, as in Jernfalem Artichoke, Goats-beard, and in moft Trees ; where it alfo retains the Name ofa Barque or Rind. Sometimes ‘tis more Thick, and maketh up the far greateft protion ofthe Root, as in the String-Roots of Afparagus, in Dandelion, and others. The thinneft and the thicke(t are all analogous, and obtain the fame general Ufes. The degrees ofits Size, amongft all Roots, may be well reckoned about Twenty, and feen in the following examples, fc. Beet, Dropwort, Jerufalem Artichoke , Tal.7, 8, 9. Orpine, Valerian, Goats-beard, Nettle, Brownwort, Columbine, Celandine, Afparagus, Horfe-Radifh, Peony, Bryony, Eryngo, Borage, Lovage, Dandelion, Parfnep, Carrot, Gc. In the Root ofBeet, fearce exceeding a good thick skim: but in aCarrot, half the Semidiameter of the Root, or abovehalfan Inch overin fomeplaces : and that of Dandelion, {ometimes, in proportion with the woody Part, twice as thick: the reft of Several intermediate Degrees: And to moft Roots, this is common, To have their Barque proportionably thicker, at the bottome than at the top. 3. §. ITIS Compounded of two Bodies. The one Parenchymous ; Continuous throughout; yet fomewhat Pliable without a folution of its Continuity. Exceeding Porous; as appeareth from its fo much {brinking up, in drying. The Pores hereof are extended muchalike both bythe length and bredth of the Root 5 therefore it fhrinketh up, by both thofe Dimenfions, more equally... And they are very Dilative ; as is alfo manifeft from its reftorablenefs toits former bulk again, upon us |