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Show The Anatomy | cle Book I of Plants, is ofits broken Blac Ider wefhould thence by the fame reafon conclude that they are not penetrable by the breadth neither, and fo no way; and thenit need not be ask'd what would follow. But certainly the Sap in the Bladders of the Pithis eitcharged and repaired every moment,as by its fhriv’ling up,upon cutting the £ lant,is evident. 32. ¢. We fuppofe then, thatas the Sap afcendeth into the Trank bythe Liguovs Body, fo partly alfo by the Pith. Fora piece of Cotton a on Appendix. with one end immers'd in {ome tinged Liquor, and with the other erect above, though it will not imbibe the Liquor fo far as to overrun atthe top, yet fo asto advance towards it, it will. So here, the Pith, being a porous and {pongy Body, and in Its Vegetating ftate, its Pores or Bladders being alfo permeable, asa curious Filtre of Natures owncontrivance, it thus advariceth, or as people ufé to fay, fucks up the Sap. Yet as it is {een of the Liquor in the Cotton 5 fo likewife are weto fuppofe it of the sap inthe Pith; that though it rifeth up for fome way, yet is their fome term, beyond which it rifeth not, and towards which the motionofthe afcending Swpis more and morebro- ken, weak and flow, andfo the quantity thereof lefS and lef. But becaufe the Sap moveth not only by the length, but breadth of thej Pith; at the fame herefore as it partly afcendeth by the Pith, it is likewife in P Pores. Andfince the reticd into the Ligvovs Body or into its 1on of the Sup by the breadth of the Pith not being farcontinued, but collateral, is more prone andeafie, than the perpendicular, or by its length it therefore follows, that the collateral motion of the Sap, at fuch a height or part of the Pith, will be equally {trong with the perpendicu lar at another part, though fomewhat beneath it; and that where the perpendicular is more broken and weak, the collateral will be lefss and confequently where the perpendicular tendencyof the Sap hathits term, the collateral tendencythereof, andfo its preflure into the Lignous Body, will {till continue. Throughthe Pores or Vefels of which, in that they are fmall, and fo theirfides almoft contiguous , the Sapas faft as preffed into them willeafily run Up 3 as in veryfmall Glafle Pipes, or betwixt the two halves of a Stick firft flit, and then tyed fomewhat loofely together, may alfo any Liquor beobferved to do. By which Advantage thefacility and ftrength of that afcent will be continued higher in the faid Veffels, than in the Pith. Yet fince this alfo, as well as that in the Pith will have its term 5 the Sap, although got thus far, would at laft be ftagnant, or at leaft its afcent be very {paring, flowand feeble, if not fome wayor fore, as the sap moving by the breadth otherre-inforced. Whereof the Pith, prefleth thence into the Veftls of the Lignous Body; in part by the {ame Collateral motion{0 having well fill’d thee, is higher Region of the Pith, Bywhich disburfed back, into a yet partly, an partly, bythat portion of the Sup, which inits perpendicular afcent was before lodged therein 5 “tis thus here, as in anyinf eriour place equally replenifhed. Whereupon the force and vigour ofthe perpendicular motion of the Sap herein, will tikewife be renew’d 5 and {0 its Collateral motion alfo, and{0its preffure into the Veffils ofthe itsafcent therein: and {o bya preflure, Lignous Body, and confequently fromt hefe into the Pith, and from the Pi) into thefe, re ciprocally carried on 5 a moft ready and copious afce nt of the Sap will be continue d, from the bottom to thet op, thoughofthe higheft Tree, An Of Trunk: Roots and Clafpers : aps E diftin® Parts whe reof thefe are compofed, are the fame with thofe of the Trunk, and I. §.- Trunk. Roots are of but the continuation of them, vegetate by a direét defcent: two kinds: Of the one, are thofe that The place of their Eruption timesall along the Truk 5 is fomeasin Mint, &c. Sometime utmoft point, as in the s only atits Bramble. 2. 2. The other fort are fach fhoot forth at right Angles with asneither afcend nor defcend, but asto their Office, they are true the Trunk 5 which therefore, though a Middle Thing betwixt a Root Roots, yet as to their Nature, they are and 3. $- Clafpers, though theyare a Trunk, but of one kind, yet their Nature is double; nota mea n betwixit Trunk, but a compound ofb oth that of the Root and that ofthe ; asin their Circumvoluti ons, where: In they often mutually afce nd and defc 4. §._ The ufe ofthefe Parts may end, is een, be obfervedasthe Trumh Mounts, or as it Trails, In the mounti port and Supply. For Supp ng of the Trunk , they are for Suport, we fee the Clafpers of Vine Branches whereof being very s : the long, fragile and flender; their Clafpers , they were unlef§ by mutually contain’d together , they muft needs by their own weight, and that oftheir Fruit, unde cently fall 5 and be alfo liable to freq uent breaking. So that the whole care is divided betwixt the Gard ener and Nature; the Gard ener, with his Ligaments of Leather, fecures the main Branches ; and Nature, with thefe of her own find ing, fecuresthe Le&. Thei r Conveniency to whic h end, is feen in their Circumvo lutions, a motion, not fo any other Part: As alfo in their toughnefs, though muc proper flender than the Branches whe h more reon they are appendent. 5. § The Clafpers of Bryonyhave a retr ogra de moti on about evety Third Corck, tothe form a Doublet-Clafp. Probably forthe certain hold; which, if it miG one way, it may be fure more to take another, _ & §. For Supply, we fee the Trun k-Ro ots of Ivy. For mounting very high, and being ofa clof er or more compact Subftanc that of aVine; thes 4p e than could not be fufficient ly fupplied to the upper Sprouts, unlefs thefe, to the Mother-R oot, were joyn tly affiftant. Yet ferve theyfor fupport likewife ; whence they {hoot out, not as in Creffes, Brookclime, 8c. recipocr ally on each fide, but commonly, all on one; that fo they maybe falt ned at the neareft hand. 7- §- In the Trailing of the Trun k , they ferve for {tabilim Propagation and fhade. For ftabiliment. the Clafpers of Cucu ent, mbers are of good ufe. For the Trun k and Branches being long and fragi le, the Bruthes of the Winds would injurioufly hoife them to and fro, to the dammage both of themfelv es and their tender Fruits; were 6 K 2 they |