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Show Book Ill. C H A P. 0f the latter forte. r2", f # In the Anterior and middle region of Chin, the lower jawe is Therovgghrcndi'Cd rough, with a little protuberance,theordered by Nature {or the $5433; more firm iiilbrrion of Mulcles, and to this end it hath {hallow, both LXXX. inward and ontward Sinus, about the origens of the ProcefTes. The lower JAWC is allo engraven with many Cavities, as (0 many Thci‘omr rcpoiitories of the Teeth, of which there is no certain number, by reafon 5th manycavi"m 0f the lower forte. ionic are endowed with more, and others with leis, according to the va-' hiyci'oghiu." lifcliiiiiirr AN, the innit excellent of all Animals is enducd with a {hoit 2" imiiaid lower Mandible (ii reference be had to the bulke ofhis Body) Emil" which is made by his round Face, which is long in other Animals , who hip. The lower port themlblvcs with Aliment, by deprefling their Heads toward theground7 and it is made ofa hard folid fubf'tanee, that it might well coinport it {elf with firong motions in biting and eating; and lo" there Mufcles {hould he difcompofed with over-much weight of the Jawe, Nature hath wifely contri. iiifii‘li'bl-iij, Vcd many Simu‘, or Cavities in the lower Mandible, filled with Marrow. The human Thefe Simir are not engraven in the lower region of the Jawe in Man, as fifffif‘ffli in Beafis, but more toward the Chin and Sides of the Jawe; and in mid Ul‘l‘clman' Animals it is compoted of Two Bones, conjoyned in the top ofthe Chin; 33¢]??th but in Man the lower Mandible is competed of one Bone, which in the high- uitirc Bone. er region of the Chin is thick and broad, and not ending into a kind of Cone as in other Animals. 2.1:";th. And in an Embryo the lowerJaWe feemeth to be compounded of Two m. i}, he Bones ( not yet come to perfection ) by reafon lome part may be membra‘T‘wgfifilcff nous or cartilaginous, as not perferftly oliified 5 yet when the lower Mandible is rendred mature, as in every part becoming bony, it is very confpicuous to be one entire Bone ;‘and upon this account the Orripiit in Embryos may be laid to be many Bones, as confifiing of many parts, Tome membranous, other cartilaginous, before they are perfectly turned into Bone, and after the fame manner every Verteber of the Spine, in its origination, may baconccived to be competed of many Bones, before the membranous and grilly parts become bony, which is found in Children of more mature age. The tri'mina- On each iidc toward the termination, the lower Jawe is furniihed with ,‘l‘jj‘flmjfl‘fc a Procehs tiling upward, which by tome receive the appellatite of H011": hiillfditrcds‘fh and the Anterior of thefe Procefies is thin anti broad, and terminates into a Cone, called by the Greek: zrrm‘in to which the Tendon of the temporal Mufrle is firmly affixed, from whence the luxation of this Mandible , is thought to be very dangerous $ch55;: of The. hinder P'rotefs being cndued with a more obtuil‘ Figure, 15 accommoda- Piocclsiil'titc ted With a Necknnd oblong little Head, (called Gina/flat by the Lari/m) ‘mfl 1:13" "‘"dl‘ is covered with a Cartilage, initituted by Nature7 in order to a more ealy motion ; with which it is allb inarticulated with a Sin»; of the 0! Parr-7,01)", l‘tslflxiriruf Mainline. 1‘ imbln'll to which it is firmly conjoyned by a membranous ligament. . ' illK'i'flrdl)"[liC lower Mandible hath a Cavity ('ngl‘aivt‘n in it, containing 1 Medullary lubi'iance, giving nourifliineiit to it, as home imagine. It is endowed with Four holes, of which, one is heated inwardly on each fide of the Proceflrs, and convey an Artery, Vein, and Ner\‘C [ofhc Teeth s and the Two other outward holes tire engraven on each file of the Chin, tranfinitting the branches of Nerves outwardly to the lower "P: an to its Mul‘cles aril Skin. rious number ochcth and their roots, which in home are double and treble, 9,1133." "1° and in others quadruple, each of which doth challenge a proper Cell in the Mandible. 'l hefe allodgments ofthe Teeth do fometimes decay,(and other times grow again) by reafon a Tooth being pulled out, its Cavity is ['0 contraéied, that its {ides do coalefce, and its footflep is obliterated, and groweth fo hard, that it performeth the oHice of a Tooth, and now and then, about the Fiftieth and Sixtieth years ol‘a Mans age, the Teeth called Sapienlix by the Latincr, do grow again, boring new holes in the low- er Mandible; and in Children when Teeth are fhed, it often happens, when the former Cavity is clofed, a new one is engraven. The Bones of the lower Mandible may be called foone-ripe, by tea. Tthoimof . . . the lower {on fome part of them is formed the Second Month; and its Figure is Jaweare very remarkable, as well as that of the Temples, and at this time, be. 233:: ,{flfnm ing framed of Two Bones, doth terminate within the Nofe into an acute WNW- Cone, which is very Prominent without the Bone of the upper Jawe, as being a Rudiment out of which the Figure of the Chin is to be formed. When the dimenfions of the Head are enlarged , the Bones of the Temples are dilated, and in which, one of the Harris, (called mam/Vt) [ryiccmgot doth inhere, and the pointed Procefs is diminiihed, till it is not extend- (and ed beyond the Cone of the uppper Jawe. "WW" lnto theother Horn ofthe lower Mandible,(called by the Greek: xcpw't'u ) mm" of the Tendon of the temporal Miilcle is implanted, and is :1 Bone ([e- ngygfcr'uh vered by a Suture from the Other part of the JaWe) defcending to the mi mm". Cavities of the Teeth, and terminates into an acute pornt. And in truth the lower Mandible, the Third Month {eemeth to be mdligm formed of Four Bones (which may be more properlyTaid to be Four gm glitim parts of one Bone, not come to maturity) Two of which are con}oyned "g"mgggm: by the union of a Cartilage; and the Two other Horns (before recited) Baffin": are United by the interpoiition of a Membrane. . . The Firlt Rudiinent of the lower Jawe, as well as other Bones, is Idifiifii; Firli: Membranous, and then Cartilaginous, and afterward Bony; To that Ime. the Second Month, Two Bones may be difcerned, as only Two parts of it are oflified; and in the. Third Month Four Bones appear, as more parts of the Jawe are rendred bony; and about the la": Month, when the Jawe is accornpliflied, as the Mcmbranous and Cartilaginousparts are turned bony, the whole Mandible 15 made one entire Subfiance and Bone. ‘ The O: Hyoidrr, (called fometimes Ypfi/oirler, and Lamdoia'er, as it 53:52:15": refembles the Greek Letters of u, and A,) is eompofed of many Bones, :piégnnimaWhich are moi‘t commonly Three, and feldom more, and then diverfe Of them too are rather Cartilages then Bones. . ‘ . The middle Bone, as the Bale of the other, is more broad and large £22321}: lii then the ref}, being outwardly of a Convexe, and inwardly of a Grippe- $17,521:," |