OCR Text |
Show Chap. l. 0f C‘ondcriflztion rmd Mrefafi'z‘on. above all a thin limpid Liquor, at firft Colliquated, is afterward as it were Coagulated into the white pulpy and fibrous fubfiance of the Brain. And all thefe fcvcral Accretions of different parts are fo many degrees of . Generation, and the refults of manifold Condenfation. _ 'tthim'nFarthermore, the Alimentary, Viral, and Animal Liquors, have their firft :iilx'iirliiius rife and greater improvement, by the intefiine motion of Rarefaéiion,vvhere- ixiiioisiilcai- by they are exalted in growing more volatil and Spirituous, to celebrate the Operations. and Intelleflual vmimf‘ll‘F‘c Vegetable, \ital, Scufible, . , thorium u . . "renown, And by the great variety of thefe inward Motions, the noble Fabrtck and hoii‘iiizintcnt, heautifulOtder of the VVotld, is preferved in various methods of Conden- hiihsoiiuit fation and Barefaéiion, fpeaking the great prudence and contrivance of that moft Divine and Omnipotent Mind: And to put a period to thefc Difcourfes of Condenfation and Rarefaéiion, I will add the famous Experiment of Thermometer, wherein the confined Air is more or lefs difplayed in greater or lefs Dimenfions, as the feafon of the Weather prefents us with variety of Heat and Cold, produced as fome would have it by the contefi of the Atmofpbcrr with the Air; the one endeavouring to prefs downward raifeth the Water, and the other refiftcth its afcent, by deprefling it by its elaftick quality, which is affcéied with greater or lefs vigour, either as it is expanded by Heat, or condenfed by Cold And Air being rarefied by Heat, doth en- large its Ditiienfions, and reduceth the body of Water into a narrower place downward: and the Particles of Air in Condenfation making their retreat Upward, take up a lefs compafs, and give leave to the Water to afcend. Moreover, thoughlconfefs in the old Thermometer the preffure of the Thermometer dtmofpbcre, may contribute fomewhat to croud the Air into a more narrow ,Hnindcwf Circumference, yet I cannot conceive how the new Thermometer ( incoldand list vented by Ingenious Mafier Boile) being very clofc, \Veathcr, in cold rhcAir ed, can be liable to the prelfure of the Atmafpbere 5 as Hermetically fealand in the interim the 32:75:??? Particles of Air, and Spirit of Wine, having a recourfc downward in cold 32;:3:13;; Weather, and their marters firaightned by Conden fation, do more tend to iifi‘lflifiwin the bottom of the Glal's,and upon the approaches C l 3 of Heat, infinuaredinto the hot Weathcr, Pores of Air and Spirit of Wine, they are thereup on receptive of larger DiLi A' ml ]i;iro;; afc;rl(l, menfions- by Rarefaéh‘on, and by an elevated moti' on do rafpt' re toward the 3133?, upper Region of the Thermometer. QEiiiiiiigi. Tranfparent and Opace Bodies, may be well entitled the Subjeét of our next Difcourfe, as being akin' to Hare and Denfe Subfiances 3 and indeed Tranfp arent Bodies being more confpicuous as they partic ipate of greater or lefs variety, and may de erve as well our remark as elteem 5 in that they 1 peak a Joy and Comfort to our Lives, as being Infiruments to propagate the glorious Beams of Light to our Eyes, prefenting us with the beautiful order of the Creation, and in it with mmy pleafant Profpeé of outward Objects, painted with divers Colour 'ts, exprelfed in variety Shapes and Sifes; and above all, Tranfparent s, and modelled in feveral Bodies, tranfmitting the Rays of Light to treat us with the harmon ious Lineaments of different faces to give usa grateful fight of our Friends, which vlerfe, fpeaking a kind of tranfport of Joy fetteth a Luftre upon our Conin our amicable Difcourfes with t rem. ""913",""t And Tran/parent and Den/e $011M. Chap. I, upon. this account, we are highly obliged to Tranfparent Bodies of Eafl'gfijo'fu' fEtherand Air, and the like, as receptive of bright Beams imparted to them onC {cart-d a» as clear Subftances, made up of innumerable Pores aranged in gainlianothcr, _ fuch an Order, . r,- which they one agaml‘ t anoth er, that they feem as it were pervious by reafon are rcccptirc of many arraghr. infenfible fmall Duets, through which the fpl endid Emanations of lucid Bodies Bodies are darted with a molt quick motion to the Globes of the Eyes, which bciufl compofcd of divers Tranfparent Membranes and Humours, a‘ll befet with‘Minute Pores, receivmg the fubtle atthereal Particles, (making feveral tefraéiions in f0 many different Mediums) being embodied with vilible refcmblances, do give appulfes upon the Retina, the immediate fubjeéi; of Vifion. ‘ And truly, to apprehend the nature of Tranfparent Bodies, there are none abfolutely f0 called, becaufe no fubltances are f0 univerfally encircled "cm, uniform empty Spaces, but there are fome denfe Interfticcs intetfperfed, \VlliCh hinder the reception of bright [Ethereal Bodies, and the more they are cxpallClCd, and ranked with numerous Minute Pores, the more they are receptive of fluid and airy Particles, beautified with Beams of Light: And Bodies, the more they approach to Denfity, as having a more clofe ComPagc, and leis Cavities irregularly ranked, they grow more opace, and fo are not capable of the tranfmiflion of lucid Rays, through their more folid fubfiances which make reflections, conveying the drapes of vilible objects to the Eyes of the Spectators. And this Hypothelis may he experimented in fine Linnen, as Cambrick, Tifany, or the like, compofed of fmall Filaments, interfperfed with many Vacuities and Chinks, through which the Air fporteth it felf backward and forward, illulirated with bright Rays: And if you clap divers fine Linnen' Clothes one behind another, in which the Interfiices of the feveral Clothes Opace Berlin at: Dcnfe, ha~ vmg very {mall Cavititl irregularly placed, Ehroughwhicll the rays of Light cannot be tranfmit: tcd. do not anfwer each other, they will obl'ttué‘t your fight in reference to Ohjccis placed beyond them ' The fame lnl'tance may be given in the Membranes of Humane Body, as the @criion.m2n, Omcntum, Dun: and Pia Mzter,lnteftines,which being contextures of fine fpun Filaments, not fo clofely interwoven with each other, but that fome little fpaces may be left, through which the fubrle particles of Light do infinuate themfelves, rendring the Membranous Subfiance tranfpatent; and if many Membranes be conjoyned, and that the ranks of void fpaces lodged in feveral Membranes, do not happen direftly oppolite to each other, the beams of Light are intercepted by the more opace parts of the Membranes, which do not throughly receive, but make refleéiions only of thofe lucid Particles. But the Liquors of the Eye, the Crifialine parts of the Blood, the Netvous Juice, Lympha, and Urine, and the like, do partake of that noble quality of Tranfparency, as encircled with bright Emanations of the Planets, which have recourfi: into their open Compage, as confifting of innumerabl e infcnfible Cavities, eafily admitting the fubtle Particles of Light; and as the are made up, of many ranks running in {traight Lines, and feated directly one againfi another, do tranfmit the bright Rays from one tide to the other, Clean through the body of the Liquors, when oppofed to the Light. And Gems, which for the molt part have no intrinfick value, but Cfieem giveth them (unlefs fome of them have Medicinal vertues) what and are llfed for Ornaments to fpeaka Foil to thofe more excellent Jewels of the Sex, Whofe greater embelilhments are Grace and Virtue, imparting to them a higher Perfet'ftion than of outward Form and Beauty: Though accompanied With great variety of Gems, receiving their Luf'tre, partly from refleéiions of light, and partly from Tranfparence, derived from bright Particles darted through their various toWs 0f innumerable minute Pores, which give them high Price and Value, receiVed from the opinion of great Perfons, who are more peculiarly difiinguilhed from the Vulgar, by thefe {cleft Ornament;- d E n Liquors are tranfparent, as made up of many ranks of infcnfible Cavities running in liraight Linastht'ough which the rays of Light are darted through the body of the Liquor. |