OCR Text |
Show Ofthe Vegetation Book II. thofe likewife(as voformed in the Center, the fucciferous run along, w) or Froff upona Windo latile Salts [boot along the fides of }a Gla, Seas ag } 7 them ina R in. and{foare, as it were, Incruftate about 2 : parts of the Aer, 36. ¢. SOME OF THE more /Etherial and Subtile Howthe feby a certain Magniveral Parts as they {tream through the Root, it fhould feem, come tobe gfe, do gradually difpofe the Aer-Veffels, where there are any ftore of them, into Rays, This Attraction (as Itake leave to call it ) or Situate be argued, Magnetick power betwixt the der and thefe Ve/fels, may e | From the nature of the Principles common to them both: Fromth not the Elegral nature of divers other Bodies; the Load-/tone being both before (a) (a) Lib. 1. only one which is attractive: And fromother Effects, parts of the ur inferio the in ore Wheref ned. mentio er @.2. §.25. & and hereaft fromthe Aer. c.4. Append. Root, theyare lefs Regular 5 (6) becaufe more remote , And in the upper parts of many Roots, as Cumfery, Borage, Parfnep 3+ 23° (b) P14 where thofe that are next the Centre are confufed, or differently the Aer, are poftuae 8.9, difpofed thofe next the Barque, and {o nearer the fame reafon it For Rays. into ufually ly, and Regular d more Doo 6 may be; that even the Sap-Veffels in the Barque, as often as the Aer Vejféls are more numerous, are ufually difpofed into Rays, as follow- ing the direction of the Aer-Veffels, And that the Paren hyma of the Barque, is difpofed into Diametral Portions : and that where the Aer Veffels are feweror fmaller, thefe Portions are likewife fmaller or none 5 as in Chervil, Afparagus, Dandelion, Orpine, Biftort, Horfe-Radifh, Tab. 7,8, 9, Potato's, &c. eeerca 37. §. The faid Atherial parts of the Aer, have a Power over the Aer-Veffels not only thus to Difpofe them 5 but alfo to Sollicite and fpread them abroad from the Center towards the Circumference of the Roof. By which means, thofe Roots which have no Pith in (c) Pats ess. their lower parts, obtain onein their upper. (c) And the fame Pith, or which in the lower part, isratably, {mall, in the upper, is more or (d) Ib. §. 4. lefs enlarged. (d 38. §. The Spreading of thefe Veféls is varied, not only according to the Force the Aer hath upon them, but alfo their own greater or lefS Aptitude to yield thereto. As often therefore, asthey are Slenderer, they will alfo be more Pliable and receflive from the Centre, towards the Circumference. Hence, in fuch Roots where theyare Tb. 2, & 6,fmall, they ftand more diftant; asin Turnep, Ferufalem Artichoke, Po, tato’s, and others; and fo their Braces are fewer: and in the fame Root, where they are fmaller, their diftance is greater. Befides, in thefe fmaller Aer-Veffels, the Rings being lefs, and the spiral Fibres whereofthey are made, continuing to /hoot; the faid Rings therefore, muft needs be fo many more, as they are {maller; and fo take up more {pace bythe length of the Root 5 and fo, not being capable of being &c. crowded ina right line, every Veffel will be forced to recede to acrooked or bowed one. 39. §. The Sap Veffels,being by the Parenchymous Fibres knit to thefe, will likewife comply with Their motion, and fpread abroad with them. (e) P.t.3. Yet being ftill fmaller (e) and morepliable than the Aer-Veffels, and fo $..16. more yielding to the intercurrent Fibres of the Parenchyma, their Tab. 6. braced Threds will, fometimes, be much more divaricated, than thofe ofthe Aer-Veffels; asin Fernfalem Artichoke. And becaufe the Succiferows Veffels, Book II. 89 of Roots. Vefels, although they are joyned to the Aerial by the Parenchymous Fibres, (2) yet are not continuous with them; ‘neither fall under (4) P.t.05 the like Attraitive Power of the Aer, as the Aerial do; the Aerial $.12, therefore, upon their fpreading, do not always carry all the Succifevous along with them 5 but often, ifnot always, leave many of them behind them fprinkled up and downthe Pith; as in Parfley, Carrot 7 nanaOe Jerufalem Artichoke, Turnep, &c. may be fen, 40. §. The /preading of the Aer-Vefels ftill continued, feveral of them, at length, break forth beyond the circumference of the Root 5 and fo are diftributed, either in the lowerparts, into Branches and Strings; or at the top, into Leaves. And left they fhouldall fpread themfelves into Leaves, and none be left for the Caulis; as where they are very {mall, or the Sap-Veféls to bound them, are but few, they might 5 therefore divers of them are, oftentimes, more fre- quently braced in the Centres for whichreafon, they cannot fo eafily {eparate and {pread themfelves from thence, but run more inwardly up Tab. 6. into the Caulis, as in Borage. : 41. §. FROM THE various $7zes, Proportions, and Difpofitions How the of the Parts, Roots are varioully fized, thaped, moved and aged. Thofe whole Root which, by their Annual Growth, are large; have fewer, both Aerzal, is differendy and Sap-Veffels, and a more copious Parenchywa. So that the Aer- fized and Veffels, or rather, the Aery Ferment contained in them, volatilizing *¥P°% only a fmaller portion of the Szp5 the faid Szp is lefs capable of advancementinto the Ziz#k; and fo muft needs remain and fix morecopioufly in the Roof, which is thereby more augmented. And where the Sap-Vefels. alone, are but few, the Root is yet, tatably, fomewhat large: but where they are numerous, it is never fo, as to its Annual Growth, in any proportion to their Number: Becaufe their Tin@ure, which is Alkaline, will go farther in fetting the Parenchymous Parts: than the Tindure of Thefe, which is Acidulate, will go, in fetting Them. (b) (b) P. 2: 42. §. When the Aer-Veféls are more pliable and fequent to the s. 31. Attra@tion of the Aer, and fo fpread themfelves, and the Succiferous together with them, more abroad 5 in the manneras hath been faid 5 the Root alfo will grow more in Breadth; the nutrition ofthe Parenchymous Parts, to which the Vefels are adjacent, being thus, by the Tab. 2, & 7. fame dimenfion,more augmented as in Turnep,Ferufalem Artichoke, 8c. Tah, 7, & 8. But where thefe are not {pread abroad, the Root is but flender; as in F Afparagus, Dandelion, &c. 43. §. If the Aer-Vefels be contracted into, or near the Centre, and are fomewhat Large or Numerous; and the Seeelriers alfo more copioufly mixed with, or furrounding them; the Root grows very Long ; as do thofe of Feil, Vine, Liquirifh, &c. For the Aer-Veffels Tab.2,& 17. containing a more copious Ferment, it will well digeft and mature the Sap: Yet the Succiferous being over proportioned to thems the Sap will not therefore; be fo far volatilized, as to afcend chiefly into the Trunk but only to fubferve a fuller Growth of their Veféls + which being more numerous, and fo more fturdy, and lefS fequent to the expanfive motion ofthe Aerial 5 this their own Growth, atid confequently, that of all the other Parts, cannot be fo muchin Breadth, as Length: $ 44. $5 |