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Show Of the Eyes. 376 Book Ili, Book III. nature of Mufcles, Membranes, and Humours,which do depend upon each other, and are all fubfervient to the noble as well as pleafanr and "fem fun- élion of Sight. . , i The Eyes may be flyled Appendages of the Brain, as being affixed to the Medulla oblongara, by the interpofition of Optick Nerves, which give them Settle and Motion, as aflilted with Mulcles. . The fearofthc Eyes. 4 ~ ~ The greatell: part of the Eyes are lodged to fit Cavrties, ( rclembling the fegmcnts of a Sphaare) and well fortified both behind and laterally With firong Concave Bones (in which thefe finer Orbs lport tliemfelves in "fiery of motions) perforated with many lmall Pores 1n the upper region of their Cavities through which del'tille‘th a thin liquor from the Brain, bedewing the Eyes, (rendring them more pliable ) to refi'eih them, left they {hould be hot and parched by confiant motion. ~ . The tender and lateral regions of the Eyes are iafi-ly immured in Cavities, furrounded with the Bones of the Forehead and upper Mandible, with the upper and lower fine Integuments, with which the anterior part of the Oil) The Eye- lids. of the Eye is vailed and unvailed at our pleafure. ' Thefe upper and lower Lidsare compofed of a tender Skin, under which is feared the Nfembmna Cams/'4, attended with a very thin Tericraizinm. The variety of parts rarely enfolded one within another, hath its extremity en- circled with a Limbm, fringed with fine Hairs, like {0 many Rays emitted T he lowerLye-lid. from a thin Cartilaginous Margent. Thelowet Eye-lid taketh its rife from the margent oi the upper part of the fiiperior Mandible, and terminateth near the clofe of the anterior part of Thcuppcr Lyt-iid. the Eye 5 This is conceived to be immovable. ‘ But the upper proceedeth from the Superrilium, and is terminated near the upper region of the Eye-lid, and endued with contrary motions ofopening and {hiitting, performed by the contraé'tions of different Mufcles. The Elevator of the upper Eye-lid 1- hath its origen about the Foramen oi The Elevator t' t‘ iipp r the Optick Nerve within the Chamber of the Eye, and 'being deduced from ‘ a thin carnons principle, is expanded into the margent of the upper Eye-lid) ending in a broad thin Tendon: l his Mufcle being contrac‘ted, liftethupthe Eye-lid by drawing it into diverfe wrinkles, by which the Eye is laid 0an and bare. The Antagonifi Mtiltle of the upper Eye-lid, according to Learned thx- The (eritidar hluit‘etf thc Eye ha. liar, Ii'/Pfl/illgilkf, and Barr/Jolinc, is a fingle Orbicular Mulcle , feared between the hielfllmma Carlin/4 and Pericmneum, near the roots of the NOE; and taketh its origination from the inner Angle, and is carried under the lower Lid with Orbicular Fibres to the outward Angle, and afterward en- circleth the upper Lid, and maketh its infertion into the greater angle ofthc The Sendai:tnlar Miiltlts CF the Eye. Thcupper semitirtular Mul'cle. Eye, where it began. This Mufcle at the firfi light feemeth to be an 0? bicular Mulcle, but upon a firiét enquiry it may be difcovered to be two Semicircular Mufcles, oi. which the upper and greater, feared in the upper Lid, borroweth its beginning from the inner angle of the Eye, near the Nofi'i and pafling from thence, the whole length ofithe upper Lid is inferted into the outward angle of the Eye, taking up the whole [pace between the Eye- brow and the Limbm of the upper Lid, and being moved downward, frrpogtheth the upper Lid, and covereth a great part of the anterior region of I C 'I'licloucr Semitirtular Murtlc. ye. The other Semicircular Mufcle arilEth with an acute origen from the fide "f I the Nofe a little below the other, and palling crofs the lower Lid, and ‘i' ling a little above thelefier angle of the Eye, is implanted with a broad in' fertion into the upper Lid, to which it exactly clofeth the under Lid, by "i" {ing 0 "96‘ E C'I- fin it fomew h at upwar d . The whole ComPagC 0f the Eye is a fyflem 0f many parts 0f different A <Etiitiption cl the Etc. ‘ If thefe minute y So tiat Semicircul 877 i coriirar)' motions, the Mufcle of the upper Lid pulleth it doliyzrficdetshhavi‘ ficflfi'fif'f the lower a little lifteth it up, Wherefore it is evident they are dii/ers Mufacl 0 win mam as having diflinfl Originations hath welloblerved, @051 in and Infertions : And Learned fiiemerbfu es, fatici Spafma Cynico, pre iizfi'rior em ml ehreck immobile»: (/9: welutz' convul/Itm, (7 dear/um dJrafidm fnbfiflere dulm 11:11:," yupcrior naturaliter mammr, quadfieri mm pofl}! fl utraq; palpebr; ab mm Mug/f I f 1 [‘1 tit/o mowrelur. The Semicircular Mu c es per eét c olin the Limbm of r . ' different motions, do draw the CurZains ofrie 'Pa/pebm, and 3:53}: lEiSesby repole and retirement in the filent Night, from the frequent follicitatioiis i troublelome Vifitants, the various refemblances of vilible Obiects n is which the Eyes, when we are awake, do perform a duty of attendahceiar: give intelligence to the. Brain, their Supreme Lord and Maker. About the confines of the Eyes and Forward, we meet with the Superci/ia being twa prominent finall Arches feared in the upper margents of the bones Risa?"- of the Eyes, and covered with a thick Skin, curiouily fliatied with iEmicir clesof Hair, not lo much ornamental to the Face, as ferviceable to the E '6; to receive Dull and Humors deicending from the Forehead which wduld elfefurprii‘e the Eyes, and by rendring them uneafie, would hinder their light and motion. ' About the greater and inward Angles of the Eyes, are placed the mafia Larry/mm, finall Cavities more confpicuous in great Animals, and iii etions given to weeping; through thefe finall perforat ions How little Rivu'lets in {0 great a quantity, upon the furlace of the Eyes, that they overflow the banksof the upper and lower Lids, befprinkling the Cheeks the fad heralds of the Mind, dilguifing the Countenance with great dro s and proclaimifi ' the pailionate forrow of fome importunate lofs. ) g Moll Ingenious szo bath diicovered many {horr Ducts arifing about the roots of the Cilia, which hardly can be feen, unlel"s the Membranes ( when the bones of the Note are broken ) be left entire. Thele Excretory Vefiels creeping down on each fide of the Nofe do dif- Extretor)' chargea ferous liquor into its Cavity, in Sheep, Calves, Hares and Coneys' Fiflciiwi‘h They do not arife exactly at the roots of the Cilia, but more inward and riggizgm‘é ‘u are'yet more deeply feared in Birds, in which they are larger than in bther cm Animals, and terminate into the Chink of the Palate; Horfes the VeITels geérapfmirtfd from the Eye, and are continued in theInwhole length of the 0 n an oftermina Eye~bros,Wes Men te into the Exrremity ' of the Lachrymal VellEls in ' the fi Thefe Excremry Duets may be cornprifed under two kinds, the one con- , ., _ neth on the outward angle of the Eyes, and do relate to the Glands feared 2:13:13;EKln It. And the other kind of Lachrymal Vellels do dilcover themfelves about iiistiiiiz‘luigl: the extremity of [he Limbzu belongi ng to the Eyelids, and do tend toward, 3%???" and at lal't creep under the Glands lodged about the greater angle of the Eye. )w bAnd alfo Aquapendmt, and Marcbetti, have found our two Perforations a out the lelTer angle, obferving the fame order with thofe of the greater. But hefide thefe Excretory Vefiels, Meibomim, after a molt curious fearch, dlfliovered Fifteen more in each Eye-lid, flowing From (0 Glands lodged in them, and terminating all round the margen many minute t of the LimWa encompafling the upper and lower Eyelids. 1" the angles of each Eye eafily may be difixrned two Glands, the leis is In: G- i, fared in the inward angle of the Eye, fiyled common ly ("armada Latrjv- f‘afmii‘l 'u‘i‘ W1", Which is a thin {mall Gland, made up of a lax fpongy fiibfianc e, and 351:5" "26 °mep1rtof it is lodged in a Cavity of the firfi Bone of the upper Mandible, through |