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Show De Reti Niirabili. terial branches, that do compofe the Reta mirabile, and thence do climb up the Bafe ofthe Brain, are infeéted with the fame hue. And this I conceiVe C H A P. to be the reafon why the Liquor is fooner tranfmitted into the oppofite Arte. The pafl'age of the Blood through the Brain into the Jugulars. lars; wherefore the Liquor injected into one Artery, is more readily recei. Ved into the oppoftte Artery ( one fide communicating with another, by di. its provided on one tide, that the Brain fliould not be robbed of its duetri. bute of Blood 3 and on the other, that it {hould not be killed with kindnefs, one plain entire Figure, but many divifions and unevenneiies, in which Na- as overflown with too hafiy a current. As to the Firfi, the ufe of the oppofite Arterial Branches entertaining correfpondence with each other by murual Inofculations is this, If it {hould happen, that the Carotide Branches fliould be {topped in one fide of the Neck, the Brain notwithfianding may be well ture feemeth to fport it felf with great variety of Ridges and Furrows, Rifes The mm, and Falls, Hills and Dales, in which the numerous Piexes of Arteries and 23‘}; iii»?! Veinslye intrenched, to fortify themfelves againlt outward Affaults of Strokes : E ' Carotide Arteries holding en tercourfe one with another, by mutual Inofcula. tions, do {peak a double advantage, becaufe in one and the fame method, lnoftuiatious H E Cerebellnm 15 f0 Pcyled by the Antients, as if it were adiminu- diih‘i‘hfiif rive Brain 5 theBrain being the greater Metropolis, and the Cerebcl- [0 5.08"!" lum but a petty Corporation, yet it hath municipal Rights, and peculiar pri- Blamviledges and perfeé‘tions, as a difiinét Body from that of the Brain, and is lodged in the lower and hinder part of the Skull, within the large Sim» of the'Oca'put, and in Brutes filleth up almoflr all the Orciput. ( r The Cerebral/um hath abroadiih deprefl'ed Form, and on both fides doth ten The Figures? fembie aGlobe, or rather two Globes clapt together, and nor endued with il;"'""" Wherefore we fhould with all Thankfulncfs and Reverence admire that Di. vine Hand, who difpenfeth the Blood within the confines of the Brain, wjzh fuch Goodnefs and Wifdom, not any ways parallel'd by Art, becaufe the of Arteries. De Cerebello. to the Veins, leading into the Sinm, and thence re-conveyed into the jug", verfe lnofculations ) then by too long a circuit of the Brain, before it can be transferred into the Sinai and jugular Veins. The ui‘e of the mutual XLVII. ry, then into the jugular Vein, becaufeOit cannot be received into the Veins, until its paifage through the feveral regions of the Brain be firft admitted in- fupplied with Blood, imparted to it by the oppofite Arteries of the other; And as to the Second advantage, If the Blood fhould be carried upward with an impetuous manner, threatning an inundation of the Brain, Nature hath moft wifely provided by diverfe currents, to divide the great violent firearm and Falls, to prevent theill accidents of Contnfions and Lacerations. The Brain is variegated with irregular Anfraflm, but the Cerebelltmt is Thelma" , . . . . ftl C ranged With more uniform ranks of Lamelloc 1- adornmglts furfacein parala Zuni: m ' + T. 50. F. r. 161 lines. ssgsga ' Its former and latter region is determined into the @rmfl‘m me'formis The Mum _ by various oppofite Arteries, propagated by lnofculations from one fide to the other, to divert the over-hafty torrent of Blood, thereby anticipating the overflowing of the Brain. _ . + and the little Circles, and as they approach thefe terms, as in the two Poles, are moft {hort 5 and from thence as they approach the top, as to the qutdtorfiht". parallel Lines grow longer in the Sphere. Thefe Lamellat as they confine on the Surface are Cortical, and of a cineritious Colour, but the more r m" r ‘ oiiréfélféi ffl'f'g, F, H ehgmbw U,thctmzu. inward are Medullary, being ofa Whiter hue; And thefe Cortical and Mei . dullary little Circles are f0 variegated and intermingled with each other, that it is very difficult, if not impofiible to part them ; Thefe Medullary Veins refolve themfelves on both fides of the Cerebellar", into two large Medimllia, which are of the fame colour, but fomewhat of a more folid fuba fiance then the Corp»: calla/um of the Brain. _ The Cerebellum in fome Animals is compofed of an orderly Fabrick, one Thcordnz'j part exaé‘tly anfwering another in uniformity, and all the Lamellce running 5:32:37. about the Surface of the Cerebellum in a parallel manner, obferve the fame 3:31:1th 2",. drfiance and proportion; But in other Animals, there be Claim/1', as it were "1,591" in Epifpbaerer, adorned with leffer Circles, which are fal'tened to a prime Spharre, m w" beautified With greater Circles within; and the fmaller Circles may be cal- led Excentrick, as the Lamellce are difpofed in a different Series from thofe great ones of the Cerebellum. V . The Cerebellum is a Compage finely made up of a great number ofArte~ The "mm-r ties fpringing from the Vertebral, and Veins from the Jugular; thefe veflels ;:;f"""‘ fire feared for their better fecurity, in the Interl'tices of the Lamelloe, and bemg curioufly branched through the Pit: Mater, do oftentimes acoft each other, "1g interwov enlike Net-work,and atlafi do terminate into the Fourth Si- mm. This rare firnfture is not only compoEd of Arteries and Veins, but alfo 0 innumerable Company of nervous Fibrils, as fo many Lamina: or Layings, PM" in Pm Elem: order one by another, ending toward the confines ofthe Carlie/[11211,- |