| OCR Text |
Show Of Light in order to String. 89+ 'BOOliIH. a rapide Motion, are impatient of lie-ft, when they fall in a point Upon Arightmoti- the Surface of a dark Body 3 10 that it IS ufual in Nature, when {"gtho. 33,2253; rion degenerates into 2 Circular, that the extream parts oppoutc "{each. {gfgi‘lfu' other7 which obey the conduét of the utmoflt terms, have a mol't lehle totluttingafl revolution, as the middle terms are acted Wlth a more flow Motion, {0 WWW that the extream points of the Rays do make their oppofite motion with equal force, and the Rotation interceding the Incidence and reflectiofl of Rays, is. made in one point. _ . Having Treated of the Reflection of Rays, it follows that I {hould now Rcl‘raflionis difcourfe their Refraction, wherein the beams of Light falling upon a dill}mmm‘m‘ ferenttranf- milar tranfparenr Medium, are ._ . f0 refracted, that the right Simu of the Pm" "‘dl' inclination ( with which the modem Rays are enducd) obfervcth the fame um proportion, with which the inclination of the refracted are affected. An Iiillantc To the nght H O N O u R A B L E And its farther illul'tration may be thus celebrated,Suppofe a (Para/121031;), "1mm" reprefenting a Ray of Light, doth fall upon the plane Surface ofa diapha. mcnun. nous Medium, it fomewhat rctarderh its pro refs, f0 that the point of the Parallelagmm entring into a diflerent Mediuri, cannot proceed in a right progrefs, as it did in the formefr Medium,hin whic‘lhthe lucid Beam did make a uicker Motion, as bein o a more t in con: ence. tudruet ()ch- AtatFMCrlI-W d My B Lor Sh ennet I the Point (about whichgthe Ray makes an Angle) giveth lefs oppofition B A R0 N 01: L E TR , «l Stalk ) . M '5 to the incident Rays in a rare Medium, which lefs checketh their progrefs, and thereupon the Beams make lefs Angles, both of Incidence and Refraction 9 but when the incident Rays encounter a more denfe Medium, it nu- kcth a greater refifrancc, and rcndreth the motion of the Rays more flow, _ and formeth agreatet Arch, both in the incident and refracted Beams. Tlicl'rayi: We have Treated hitherto of a Plane Surface, now it remaineth to be WWW af- confideted, what fenfible difference may be found, if any be incident to a ter the fame manner. up- crooked Surface. ona crocktd Suppofe the inflection of a Ray be made upon a crooked Surfilccjna Line, f0 that it may touch direfily at the point of Incidence and the Ray - 4......1w'1 "A. *A;_;u‘f "m lhall be refracted after the fame manner, upon a crooked, 55 upon a right Surface; whereupon, ifyouobfierve the great fubtilty of the Ray, how littlea fpace the point is diflant from the top of a crooked Surface, it will produce no fenfible difference; and the Ray hath a quick or flow motion, as if is trajcéted througha rare or denfe Medium, wherein it hath lefs or greater refiliance, and maketh lefs or greater Angles of Incidence and Refraction, as well ma crooked as in a plane Surface. . ~ . ‘ a '.' F" -, i' ‘ ' ._ l ‘ M." 4 "9% V i . - .1 i " _ 7. a R T S, SCICHCCS , , a ., . . f" 0115 InCllflatlonS ‘ . being Of 3. and DlVlnC . ‘ J ~‘ nature, d0 hOld [DUCh Analogy With 0111' more Cxlefiial Part5, M, ' i " Noble EXtI‘a&, and VCI'CUA i - h the Ima C Of GOd " ' I}. if (In Wth g i5 imprinted) and d0 {peak great Pleafin‘c and Sati5f3&l0n3 as they are P CI‘4 ‘ " 3",? of our Humane nature in elevating our low intellectuals , and refining our depraved MO< rals. And I am much pleafed in confidering that Men of molt Excellent parts, (who know how to value and treat the more noble Faculties of the Mind, and their precious houIS) takernof't DCligllt in undetl'canding the gauges of Things, and |
