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Show The Anatomy twixt the two Row/s; on w hole fecu ; BookI. the growth a Rte ged in length depends. But thofe of Bea aeresdaolets, an oot, Warder, and many more, upon SONY re{pects, are ass up in wards. Laftly, there isthe Tre-Rowl, as in Bern 5 the abe Aa re of, though all rowled up to the main Stem, yet peas yt {tanc 6 firm andfecure fromthe Injuries either of the Growad or Weather,un\ 5 to the Row/s in breadth, that by the length were fuper-indue'd the stalk or main Stem giving the fame Protection here, which in other Plants by the Leaves, or {ome particular Mantling, is contriv’d. Thefé, and aoe ee See in the Figures belonging to the First dart of the Fourth Wook. | sPart c Beats the Form and Foulding of every Leaf or Germen, is its Protetion order's about fix ways whereof may be obferv'ds /c. by Leaves, Surfoyls, Interfoyls, Stalks, Hoods and Mant- lings. Toadd to what we have above given, one or two Inftances. Every Bud, befides its proper Leaves, 1s covered with divers Leafy Pannicles or Surfoyls 3 which, what the Leaves are to one another, are that to themall: For not Opening except gradually, they adm not the Weather, Wet, Sun or Aer, to approach the i eaves, except by degrees refpondent, and asthey are gradually inurd to bear them, Sometimes, befides Surfoyls, there are alfo many Ivterfoyls fet betwixt the Leaves, from the Circumference to the Center of the Bud 3 as in the Ha/el. For the Fibres of thefe Leaves ftanding out fo far from a plain furface ; they would, ifnot thus fhelter’d, lie too much expos'd and naked to the Severities of the Weather. Where none of all the Protections above-named, are convenient, there the Membranes of the Leaves by continuationin their firft forming (together with fome Fi- bres of the Lignous Body) are drawn out into fo many Mantles or Veils; asin Docks, Snakeweed, &c. Forthe Leaves here be ng but few, yet each Leafand its Stalk being both exceeding long; at t bottom whereofthe next following Leaf ftill {prings up3 the form andpofture ofall is fuch, as fuperfedes all the other kinds of Proteétion, andfo each Leafapart is provided with a Veil to it felf. Book I. 19. §. of “Plants, Another ufe is for Augmentation ; or, the capacity for the due f{preading and ampliation of a Tree or other Plant tare ats Leaves. For herein the Lignous Bodybeing divided into fimall Fibres, andthefe running all along their lax and {pongie Parenc hymas; they are thus a Body fit for the imbibition of Sap, and eafie Growth . Now the Sap having a free reception into the Leaves, it ftill gives way to the next fucceeding in the Branches and Trunk, and the voyding of the Sap in thefe, forthe mounting of that in the Root, and ingrefs of that in the Growmd. But were there no Leaves to make a free reception of Sap, it muft be needs be ftagnant in all the Parts to the Root, and fo the Root being cloge’d, its fermenting and other Offices will be voyded, and fo the due Growth of the whole. As in the motion of a Watch, although the original term thereof be the Spring, yet the capacity for its continuance in a due meafure throug houtall the Wheels, is the free andeafie motion ofthe Ballance. H 20. §. Laftly, As the Leaves fubferve the more copiou ment, fo thehigher purity of the Sap. Forthis being s advancewell fermented both in the Root, and inits Afcent throug h the Trunk, and fo its Parts prepar’d to a farther feparation ; the grofler ones are {till depofited into the Leaves 5 the more elaborate and eflential only thus fupplied to the Flower, Fruit and Seed, as their convenient Afiment. Whence it is, that where the Flowers are many and to which the more odorous Particles are coptoufly receiv’ large, ind, the green Leaves havelittle or no {mell ; as thofe of Rofe-tree, Carnati ons, FrenchMarigold, Wood-bind, Tulips, &c. But on the contrary, where the Flowers are none,orfmall, the green Leaves themfelveare likewile of a {trong favour; as thofe of Wormmpood, Tanfte, Baum, Mint, Rue, Geraninm Mofckatum, Angelica, and others, ~ Thefe, and other Protefions, See in the Figures belonging to the Lirft Pare of the Fourth aok. 18. § The Ufes ofthe Leaves, I meanin refpe& of their fervice to the Plant it felf} are thefe: Firft, for Protection 3 which, befides what they give one to another, they afford alfoto the Flower and Fruit. To the Flowerin their Foulds 3 that being, for the moft part, born and ufher'd into the open Aer by the Leaves. To the Fruit, when afterwards they are difplay'd, as in Strawberries, Grapes, Rajps, Mulberries, &c. On which, and the like, fhould the Beams immediately ftrike, efpecially while they are young, Sunthey would quite fhrivel them up; but being by the Leaves fereened they imprefs the circumjacent Aer fo far only as gently to warm off, the faid Fraits, and fo to promote their Fermentation and Growth. And accordingly we fee, that the Leaves above-named are exceeding large in propotion to the Fruits: whereas in Pear-trees, Apple-trees, &c. the Fruit being ofa folider Parenchyma, and fo not needing protection, are ufually equal with, and often wider in Diametethe like r than the Leaves. An Appendix. Of Thorns, Hairs and Globulets. ie areof two kinds, Lignous and Cortical. Of the firft are fuch as thofe of the Hamthorn, and are conftituted of all the fame fubftantial Parts whereof the Germe n or Budit felf, and ina like proportion: which alfo in their Infancyare fet with the ref mblances of divers minute Leaves. Of affinity with thefe or Thorny Prickles upon the Edges and Topsof divers are the Spinets Leaves, as of Barbery, Holly, Thiftle, Furze, and others 5 all which I think are the filamentous extremities of the Lignous Body {heathe din the Skin, But this principal differnce betwixt a Bud and thefe Lignous Thorns, is obs fervable; That the Bud hathits Original from the Inner part of the Lignous Body, next the Pith: But thele Thorns, from the outer, and lef fecund Part 5 and fo produceth no Li es, but is, as it were, the Mola of a Bud. |