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Show owing. BooltHL Book III. , ‘\ Th: Rays aft‘l 1 Hall‘- Clint! ('er (Un- lrfitlmllntn .1 Con: in the Pupil oi the could not move in dircétlines 5 and after Interfcétion, the Rays are contra. fled into a Cone, and received into the Pupil oithe Eye, and there make their progrefs in an everted Pyramid, as beginning in :1 Cone, and make an- lironrz, as uni- other Angle, by being refracted in the warty Humor from the Perm, dicular, as proceeding of a more Denfe into a more rare Medium: And after the viliial Rays, being trajeéted through the watry Humor, they are tranlinitted to the Crifialline, and narrowed intoa point of Refra. étion, and make Angles toward the perpendicular, and are rendred more ttd in the pal'almilcal Figure of the t‘iulallinc Humor. {trong as they are united, which is efl‘eéted by the globular Figure of thc Crilialline Humor, as being rendred more parabolical by the motion of the ciliary Procefles, comprelling the liaid Humor, and making it more Eic. l‘lie Rays are run-tired protuberant; whereby the Rays of Sight do grow more Refraéted; and being tranfmitted from the Criflalline Humor to the Vitreous, make adif. The image at the Obieét is brought to a due Situati. omwhrn im- prinlt'd upon the Rains. ferent Angle, and are inflected from the perpendicular, as being brought {mm the more denfe Medium of the Crifialline Humor, to the more rare liibllance of the Vitreous Humor, from whence the lucid Rays ( invrll. ing the Images of things) are tranfmitted to the Retina as a more denfc Mediumy in which the Rays are refraéted toward the perpendicular, and thereby, their fituation is amended, and reduced to a due polture; and their common Bale regularly imprinted on the Retina, wherein the Figure and Colour of the vifible Object are clearly and lively painted, and molt plainly difcerned by the outward Organ, and from thence recommended by the continuation of the optick Nerves to the inward fenfory, judging and determining the nature of outward vilible Objcéis. i C H A P.' VIII. The Diaries of the Eye/lids; and their Grier. He Eyes are two lucid Globes, compofed of many Sphzrcs, of diVets membranous circular expanfions, curioufly lodged within each other, and enclofing variety of Humors 3 all which are rendred tranl'parent ( eats ce tone perforated Membrane) as receptive of feveral Images of things, aps paralled with Light, to treat us with divers pleafant profpcéts. . The Eyes being fyflems of various {ubflances ( finely enwrapping each other) as Glands, Muicl'es, Membranes and Humors, outWardly encircled with Lids, as'with Curtains, have as, many Difeafes as Parts, of whichI will difcourfe in the order Nature hath inflitutcd. The Lids firfl: prefenting themfelves, as enclofing the Eyes, are obnoxious The deduct) to divers difaflEéiions, the firfl: is called by the Greeks, rafxm, which is affeded and Thickncfi [of the Eye- with divers degrees; one is, when the Eye-lids are inverted, they appear H more thick and unequal, named by Aetim, Maw/m, denfim: pdlpebrarunt, in which the Lids are inwardly red, as coated with Pt‘a natcd Blood. The fecond degree of a Taipei", is, when the Dilgafe growing higher in The Tamar: of the Eye: the inward region of the Lids, is difcompol‘ed with little Tumors relEmbling lids. the Seeds of unripe Figs, from whence it received the appellative of ol/wm, by the Latina, palpelzrafltofll. The third degree is named w'ms by the Greeks, and Callafim- by the Lds tines, when the infide of the Lid is firfl: Ulcered and afterward graw‘eth hard and Callous. ‘ Atlaft as a fourth degree may be named \lwmsma'a, fedbiupalpebrx, in which no: only the inflde of the Eye is dil'afleaed, as in a Tampa, but the ghole Lid ls rendrcd rough and flabby, chiefly about the angles of the yes. , _ , The carafe of thefe dilhffcétions proceed, foinetimes from fero'us falt Hus mors, Other t‘mes with Bilious Recrements mixed with the mafs of Blood, and importe into the fubfiance of the Eye-lids by the terminations of the The Stabs of the Eye-lids; The caulk of the Diftal'u of the Eyclids. external Carti‘tide Arteries. . . The Cure of thefe Difeafis is perfonned by Bleeding, and proper Purga.‘ "V", and then Topicks may be fafely applied, as emollient Fomerrtations which do temper the A‘crimony of the Hunters, and after-Ward detergent and drying Medicines, prepared with Water of Pimpinel, Salendine the Great, Small-leaved Dock, mixed with Burnt Alome, Cam'phore, and Crabs Eyes, which being boiled and flrained, the Water may be applied to the bids. A Liniment made of oyntrrrent of Rofcs, and Tutty hath been "(Ed in thefe cafes with good fuccefs. « Other Tumors are alfo incident to the Eye-lids, as Warts, Hordeolri, re- Divers kinds emhling Barley-corms, Grandines, round tranfpa‘rent Swallings, and divers belonging to NOdes and Excrefcencies, fometimes of a Stony nature, which are cured by EmollicntDecoé‘tions and Liniments, and if they cannot difcharge the conF‘Cffd Matter, Chyrurgical Operations may be advifcd, to take away th‘cfi: indurated Swellings bySeél'iom CRAP; of Swelling: the Eye-lids, |