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Show BookIll. The Anatomy of Thiffle, Borage, and others, three times as big again ap caring in the Mier like to the largeft ( ells of an Hony-comb. Thofe of Plum, Worm-wood, St bh, lets. Of Elz, Apple, Pear, lefler. Of Holly and Oak, ftill or Common Thiftle, pafs only of their of 02k, Wherefore le8. So that the Bladders of the Pith in Borage are of that Size, as to contain, hee the comizontal Arca, about twenty Bladders of the Pith one whole Bladder in Thiftle, is, at leaftan hundred times bigger, than another in Oak, _ end 7. §. (OF the Size of thefe Bladders of the Pith, *tis alfo to be noted, That it doth not at all follow the Size of the Pithie felt 5 but is {till varied, according as Nature defigneth the Pith for various ufe. Thus, whereas the Pith of Sumach, 1s Larger than that of Barberry it might be thought, that the Bladders, whereof it is compofed, fhould be likewife Larger: Yet are they Three times as Small again in Sumach, as they arein Barberry. So the Pith of Plum, is far Lefs,than that of Pear; yet the B/adders of the former are Four or Five times as big, as thofe of the latter. Sothe Pith of Hazel is almoft Three times as Little again, as that of Holly; yet the Bladders in Hazel, are Ten times bigger, than in Holly. I el 8. §. The Shape of the Bladders hath alfo fome V aricty. For although, for the moft part, they are more round 5 yet ofteatimes they are angular: asin Reed-grafs, a Water-plant 3 where they are Gubical; and in Borage, Thistle, and many others, where they are pentangular, Jexangular and feptangular. i 9. §. Of the Texture of the Bladders, ’tis alfo to be noted, that manytimes, the Sides of the greater Bladders are compofed of leffer as is often feenin thofe of Borage, Bulrufh, and fome other Plants, In the fame manner, as the Sap-Veffels, are but greater Fébres made up of leffer. 10. §. The Pith, though always originally compofed of Bladders, and fo Oxe Entire Piece; yet in procefs, as the Plant grows up,it hath divers openings or Ruptures made in it :,oftentimes very regularly, and always for goodufe,and with conftancy obferved in the fame Species of Plants. 1n Sharp-poynted Dock , manyof the Poresare confiderably prolonged by the length, like fimall’ Pipes. In Walvut it fhrinketh up into tran{verfe Filmes or Membranes 3 as likew{e fometimes in Spanifh- Broom. Sometimes the Pith ishollow or Tubulary: either throughot the Trunk , as in Thiftle, Exdive, Scorzonera, Marfh-Mallow : or fo, as to remain entire at every joynt; asin Sonchys, Netzile, Teafle ; in whichit is dividedas it were intofeveral Stories and divers other ways. 1. §. T SHALL conclude this difcourfe with a further illuftration of the Texture of the Pith, and of the whole Plant, as confequent thereupon. fay therefore, (and hav n fome account hereof in the Anatomy of Roots) That as the Ve, of a Plant, fc. the Aer-Veffels and the Lympheduits are made up of Fibres. according to what I have in this Difcourfe above faids {0 the Pith ofa Plant, or the Bladders whereof the Pith confitts are likewife made up of Fibres. Which is true alfo of the Parenchyma of the Barque. And alfo of the InJertions in the Wood. Yea, and of the Frit, and all other Parenchymous Parts of a Plant, | fay, that the very Pulp of an Apple, Pear, mber, Plum, or any other Fruit, is nothing elfe but 2 Bal/ of moft extream firall tranfparent Threds or Fibres, all wrapped and ftich’d Book IL. of Trunks. fiitch'd up ( though in divers manners ) together. And even all thofe Parts ofa Plant, which areneither formedinto vifible Tubes, nor in- to Bladders, are yet made up of Fibers. Which, thoughit be difficul to obferve, in any of thofe Parts which are clofer wrought and cipally in the Jnfertions of {ome Trees yet in the Pith,efpecially prinPlants, which confifteth of more open work, theyare more offome vifible. Which introduceth the obfervation of them in all other Parench ymous Parts. Soin the Pith of a Bulrufh of the Common Thistle, and fome other Plants; not only the Threds of which the Bladders ; but alfo the aged fingle Fibres, of which the Threds are compofed 5 mayfometimes with the help of a good Gla, be diftinély feen. Yet one of the Fibres, mayreafonably be computed to be a Thoufand times fmaller than an Horfe-Hair. 12. §. The Frbrofity ofthe Parenchymais alfo vifible in fome Woods, in which, it isapparently mixed with the Lignous Parts, Infertions, but per minimas Partes organicas, Thatisto fay, not only by The Paren- chymous Fibres, like {maller 7)hreds, are either wraped roundabout both the Lignous and the Aer-Veffels, or at leat interwo ven with them, and with every Fiber of every vefél: asin very white Afh or Fir-Wood, Tih, 395 with an advantagious pofture and light, maybe obferved, 13. § WHENCE it follows, that the whole Subftanc the Parts of a Plant, fo far as Organical, they alfo confift e, or all of Of all which Fibres thofe of the Lympheduits, ran only Fibres, by the Length of the Plant : thole of the Pith, Infertions, and Parench of the Barque, run by the breadth or horizontally : thofe of the yma Aer- Veffils, fetch their Circuit by the Breadth, and continu e it by the Length. 14. §. By which means, the faid Parenchymous Fibres, in fetching their horizontal Circles, do thus weave, and make up the Bladders of the Pith, in Open-Work, And the fame Fibres being thence conti- nued 5 they alfo weave and make up the Infertions, but in Clofe-Work. Betwixt which Infértions, the Ve(fels being likewife tranfver fly intertying many of them together, and fo making thofe feveral ons and Braces of the Veffels, which I have formerly defcribeConjugatid. And jected, fome ofthe fame Fibres wrap themlelves alfo about thefe; thus as fome of thefe Horizontal Fibres are wraped about the Vefelss fo alfo about the Fibres, whereof the Veffels are compofed. By which means it is, that all the Fibres of the Veffels-are Tacked or stitched Ty be 465 Much after the fame manner, as the Perpendicular Splinters or Twigs of a Basket, are, by thofe up clofetogether into One Coherent Piece. that run in and out Horizontally, And the fame Horizon tal Fibres, being ftill further produced into the Barque 5 they there com- pofe the fame work over again (only not {0 open ) as inthe Pith, 15. §. SO THAT themoft unfcigned and proper refemblance we can at prefent, make of the whole Body of a Plant, is, Toa piece of fine Bone-Lace, whenthe Womenare working it upon the Cyfhion, For the pith, Infertions, and Parenchyma ofthe Bargne, are all extream Fine and Perfe& Lace-Work: the Fibres of the Pith running Horizontally, as do the Threds ina Piece of Lace 3 and boundin g the feveral Bladders of the Pith and Barque, as the Threds do the feveral Alles of the Lace; and making up the Infertions without Bladders , or with very {mall ones, as the fame Thredslikewife do the clofe Parts of the |
