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Show The Anatomy | BookI, 7. §. From thefe Annual younger Fibers it 1s, that although the Cortical Body and Pith are both of the fame fubftantial nature, and their Pores little different 3 yet whereas the Pith, which the firft year isgreen, and ofall the Parts the fulleft of sap, becomes afterwards white and dry: The Cortical Body, on thecontrary, fo long as the Tree grows, ever keepeth green and moift, Je. becaufe the faid Sap-Fibers, annually growtherein, and fo communicate withit. 8. §. The Pores likewife of the Lignous Body, many of them, in well-grown Timber, as in Oaken boards, are very confpicuous, in cutting both lengthwife and traverfe. They very {eldom, if ever, run one into another, but keep, like fo manyfeveral Veféls, all along Tsb.3.f:2. diftin&; as by cutting, and fo following any one of them as far as CO 3. youpleafe, fora Foot or half a Yard, or more together, may be obferv’d, Andfo, the like, in any Cane, X: g. §. Befides thefe, there are ee ae which, by the help y a d Spectacle Glafs may be obferv’d. — ari aie are ie vifible without a Microfcope. The ufe of which, excepting in fome few particulars, I have purMicrography. pofely omitted inthis firft Book. Mr. Hook thewethus, befides thefe, a third, and yet fmaller Sort; and (asa confirmation of what, in C.2.$.8. the Second Chapter, I have faid of the Pores of the Lignous Body in general) that theyare all continuous and prolongedby the length of the Truk, asare the greater ones: whereof he maketh Experiment, by filling up, in a piece of Char-coal, all the faid Pores with Mercury : which appears to pafS quite through them, in that by a very good Glaffit is vifible in their Orifices at both ends 5 and without a Ghifs, by the weight of the Coal alone, is alfo manifeft, All Tab. thefe I have feen, with the help of a good Microfcope, in feveral , forts of Woods. Astheyall appeare in a piece of Oak, cut trant. af 7. verfely, See Tub. 3. Ir. §. Upon further Enquiry, I likewife find, That the Pores of the Lignous Body in the Trunks of Herbs, which at firft I only fuppofed, bythe help of good Glaffes, are veryfairly vifible: each Fybre being fometimes perforated by 30, 50, 100, or hundreds of Pores, Orwhat I think is the trueft notion of them, That each Fibre, though it feem to the bare eye tobe but one, yetis, indeed, a great number of Fibres together 5 and every Pore,being not meerly a fpace betwixt the feveral parts of the Wood, but the Concave of a Fiber. Sothat if it be asked, what all that Part ofa Plant, either Herb or Tree, which is properly called the Woody-Part ; what all that is, I fuppofe, That a it is nothing elfe but a Cluffer of innumerable and moft extraordinay . {mall Vefels or Concave Fibers: as ina Slice of the Trunk of ByrTab, 3. fib, dock is ‘apparent. 12. §. Next the Infertions of the Cortical Body, which in the Trunk, ofa Tree faw’d athawrt, are plainly difcerned as they run from the Circumference toward the Center 5 the whole Body of the Tree being vifibly compounded oftwo difting Subftances, that of the feveral Rings, and that of the Infertions, running crofs; fhewing Tab. 3. f. 5. that in fome refemblance in a Plain, which the Lines of & 8. of the Meridian doin a Globe. The entrance of the Latitude and Infértions into the Wood,is alfo, upon {triping off the Barque, very apparent 5 as in the fame Fig. 8. . 13. ¢. Book I. i ofPlants. 21 13.§. Thefe Infertions are likewife very of Trees length-ways into Boards, and thot confpicuous in Sawing plaind; and wroughtinto Leave s for Tables, Weainfcot, Trenchers, and the like. In all which, as in courfe Trenchers made of Beech, and Tables of Oak , there are many parts which have a greater fmoothnef$ than the refts and are fo 744. 3. f- 2. many zuferted Pieces of the Cortical Body which being by thofe of © Tabsefit. the Liguou s, frequently intercepted, feem to be difcon tinuous, although in the Trw#k they are really extend ed, in continued Plates, throughout its Breadth, 14. §. Thefe Infertions, although as is faid, of fubftance from the Lignons Body, and fo no where a quite difting truly incorporated with it, yet being they are in all parts, the one other as the Woof’, mutually braced and interw as the Warp, the oven together, they z, : thus conftitute one {trong and firmly coherent Body 5 as the Timber 24 f 4) of any Tree. 15. §. Asthe Pores or Veffels are greater orlef Jertions alfo: To the bare eye ufually the greate s, fo are the Jy r onlyare difeernable: But through anindifferent Microfiope there are others alfo, much more both numerous and {mall, diftinély appare nt, asin a tranfverfe piece of Oak, Tab. 3. fi Fa 16. §. In none ofall the Pores can we obferv e any thing which may have thetrue nature and ufe of Valves , whichi that, to which they will by no meansallow a regrefss, Eafily to admit . exiftence is enough evident, from what in the fir(t And their nonChapter we have ©1.9. 4%. faid of the Lobes of the seed: in whole seminal Root, Valves, it could not be, that by a contrary Cour/é were there any of the Sap, they fhould ever grow; which yet, where-ever they Leaves, they do. Orif we confider the growt turn into Diffimilar h of the Root, which oftentimes is upwar d and downward both at once. Andbeing cut tranfverfély, will bleed, both the fame ways, with equal freedom. 17. §. The Infertions here in the Trunk give of the pofition of their Pores. For in a plaine us likewife a fight in Wainfeot, Tables, Gc. befides the larger Pores d piece of Ozk, as of the Lignous Body, which run by the length of the Trunk 3 the Trac likewife of thofe of Tab.3.f. 2. the Infertions may be obferved to be made by the breadth, and fo direly crofs. Norare they continuous as thofe of the Lignous Body, but very fhort, as thofe both of the Cortical Body and Pith, with which the Infértiows, as to their fubftance, are congenerous. Yet they all {tand fo together, as to be plainly ranked in even Lines or Rows throughout the breadth of the Trunk: As the appears to the naked Eye, fee in Tub. 3.Fig. 9. Traé of thofe Pores may be feen in the Rovt of a Vine deferibed and The Pores themfelves figured in the Second Book, as it appears througha good Microfcope. Tab. 17s 18. §. The Pores of the Pith likewife being larger here in the Trunk, are better obfervable than in the Root: the width whereof, in comparifon with their sides fo exquifitely thin, may by an HozyComb be grofly exemplified andis that al which the vatt difproportion betwixt the Bulk and Weight of a dry Pith doth enough declare. In the Trunks of fome Plants, they are fo ample and tranfparent, that in cutting both bythe length and bread fome of them through the tranfparency of the shins th ofthe Pith, by which they are bounded, or of which they confift, would feem to be ar4 bly |
