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Show Erin. C H A P. 0/ the Rebirth and blah/11.4.1760 0/1,,ch 29mm, As to their Fabriclt, thelb Globules being a great company ot‘grearer and TIveGIJv-Ica leis Tubes, and Fibres, formed ( as I conceive) in larger or {innller Arches :r‘u one feared above another, the greater being placed near the ambient parts, "3 grow leis and leis, as they approach the inward Recelll‘s, till at lall: they come to a kind of plain, into the middle of thele Collect ive Bodies, which in their Figure and Colour very much relbmhle Glands , and {0 may truly rlCllc'i'VC this appellative, in relation as they are confign ed to the liime rife XXXV. Of the Fahrick zzmz'flbflzmce of the grain. with Glands to percolate the Liquors of the Brain, and render them lit for He Brain, the molt noble part of_ the whole Body, in'reference to it: . Divine operations, hath a Fabrick fitted to accomphlh them, hein finely compofed of great variety of minute Fibres, Feared one above another . _ in excellent order. And that we may make a better infpeétion into thefe' curious minute Bo. dies, it may not be (as I conceive) unworthy our notice to treat of theft particulars; The Origen, Nature, Figure, Pi'ogrefs, Ufes, and Aétions of thefe Fibres. The Oriern ., :' the fibres, As to the firlt, they may be confidered in relation to their generation or difpeiilhtiori 5 as to the later, they borrow their Roots from the Corlex, and if taken in order of Generation, they derive their birth from the more vilcicl part of the Seminal Matter, which being firfi colliquated by the heat of the "term, into a thin Crillalline Liquor, is afterward fomewhat induratedJ and as it were coagulared by a quantity of Volatil Salt into a white clammy {uh- fiance, divided for the melt part into molt numerous Fibres, which leadeth TheCompagc me to the nature and fubl‘tance of them, as they are molt folid and tough affix??? Particles of the Brain, whole greatel't part is a curious Compage made up of iiiiiiimfi' innumerable nervous Filaments, and Velléls, whole empty Spaces are interlined with a foft kind of ‘Parencbyma, which is nothing elfe ( as I conceive) but the Animal Liquor affixed to the outlide of the Vellels. Thele minute Fibres are mofi evident in the Brain of fome Filh, Which is compol‘ed in a I-lolybut, of an innumerable company of {mall long Procelfes, and are, as I conceive, upon a firiét furvey, nothing elfe but f0 many minute Filaments, lo curioufly joyned together with little thin Membranes, that they feem to be one entire Body, running all along from the anterior to the poilerior region of the Brain, conlilling of many fubordinare ranks, feared in great order one under another 5 So that I conceive thefe numerous Filaments to be a {yltem of Vellels containing and tranfmitting Animal Liquor through all the Coal‘ts of the Brain, which I more plainly perceived in the Brains of Filh, which being wounded, and the Filaments cut, immediately out of them quickly dellilled a quantity of ferous Matter, which 15 without queilion nervous Juice, flowing out of the wounded Filaments of the Brain, which being held over the Fire, did coagulate into a White fill?- fiance, not unlike the Whiteof an Egg. Zrlflii‘hii:lhce So that the Compage of the Brain of difletent Animals, the Generation of Animal Juice, which may be produced, (asl iancy) after this manner. The Albuminons part (being in conlederacy with the Juice) when it is tranlinitted into the body of thefe Globular Glands, the purer part being lecemtid andimpregnared with Volatil Salt, is receive d into the Ori en or? the nervous Filaments, and {o by degrees conveyed through all the l'rocefi [es of the Brain. . As to the Figure of rhefe finall Fibres, the white {treaky Particles of the Tr l-lnmane Brain are divided into a multitude of little deprefled round Procefles, iliglIl'gm ibmewhat relemblingthofe very minute Intellines, thole finall Bodies, that i make the bulk of the Tellzicles, and are lo remarkable in the Ventricles and in the Brain of Filh, that if they be export-d to the oppolite light, they may be dilcovered to be ranked in fuch order, thatthey running in parallel Lines, reprefent the Teeth of an Ivory Comb, and in the Cerebell ar/I, mam Lami- m are {cared upon each other, from which many nervous Filame nts fprourr iug out and equally fpreading toward the Surface, do reprelh nt the Branches of Trees, varioully Fporting their fmaller Twigs clothe d with tender foliage. Their: minute Fibres being the 'Prima Nerworum Stamin a, the very Linee ainents in which the Nerves are firlt deligned. And do borrow their birth from the ambient part of the Brain, implan « ting their tender Winding Fibrils into the Cortex, which are thence propan gated through the Corpus Calloflmz, tranfverfly overfpreading, as with a eSCCling the arched Chambers of the Brain, and afterward the Medal/a oblona gate is all belCt with nervous Filaments, very confpicuous in the Corp/7m firm"; the firlt beginnings oi the Medulla oblongara, and may be called Due "for"? Fdftimli, two rare l‘yl'tems of Filaments, palling dcx of the Medulla oblongdm, and at lal'r uniting themfielves through the Cau~ toward the lower Region of the Medulla, do conflitute the bodies of Nerves, made up of thefe numerous Filaments; And now I will not infil't any longer upon the rile 311d prOgtels of thefe Fibres, becaufe I fhall have cccalion to difcour‘ fe more fully of them hereafter, [is to the ufes of thefe nUmerous Filaments, the Hill may be to fortifie the The firflgnc Brain, whole 'Parencbyma being of a tender fluid nature, would ealily be 3,1,522‘0‘3‘5; rimmed OUfOFits proper place, were it not fupported by thel'e more folid gm" ,1:lbtils, which are the more firm Particles of the Brain, and are as (0 many Men, Balls, ismarlc‘upof Fowls, and Filh, are framed of a number of Globules, as {0 many {mall 21325,?th .rlllcm to under-prop it, left in violent concuflions, this (of: Fabrick being very Poflderous, lhould fubfide and comprefs the Capillary Vellels, inter~ "‘3‘5' CCPtlng the due motion of the Blood. Bodies of various lhapes and fizes. Thele Globules (as I apprehend) are aggregate Bodies, confilling chitily of Fibres, and l‘ome Arteries and Veins , and perhaps LymphaeduétS, which may be worthy a curious lbarch, becaufe it is not altogether unreaion-able ‘0 imagine, where lo many various, nervous Fibres are lodged, that they maybe accompanied With Lymphatdnéts as well in the Brain, as in other parts of the Body. As .Anotheruleof the Nervous Filaments, may beas Repolitories, or rather Turret-oar minute Chanels of the Animal Liquor wherein it is convey ed through the ill; i'arious Procelles of the Brain, into the body of the Nerves, which is much mm qu‘ckfmd by the accidental motion of the Brain, canfed by the pulfarions of Arteries, but principally by the gentle, natural, oppolit e motions, produced Ycon'ttaé‘tion and relaxation of the Fibrils, flowing from the dietates of the Y it I Appetite |