Opticks : or, A treatise of the reflections, refractions, inflections and colours of light . n, which was of abluifli green within next the white, and of ayellow and red without, and next about thefeColours were blue and green on the infide ofthe outward Crown, and red on the outfide ofit. At the fame time there appeard a Halo a-bout 22 Degrees 35 diftant from the center ofthe Moon. It was elliptical, and its long Dia-meter was perpendicular to the Horizon, verg-ing belovv farthefk from the Moon. I am toldthat the Moon has fometimes three or moreconcentrick Crowns of Colours encompafiingone an
Opticks : or, A treatise of the reflections, refractions, inflections and colours of light . n, which was of abluifli green within next the white, and of ayellow and red without, and next about thefeColours were blue and green on the infide ofthe outward Crown, and red on the outfide ofit. At the fame time there appeard a Halo a-bout 22 Degrees 35 diftant from the center ofthe Moon. It was elliptical, and its long Dia-meter was perpendicular to the Horizon, verg-ing belovv farthefk from the Moon. I am toldthat the Moon has fometimes three or moreconcentrick Crowns of Colours encompafiingone another next about her Body. The moreequal the globules of Water or Ice are to oneanother, the more Crowns of Colours will ap-pear, and the Colours will be the more Halo at the diilance of 22t Degrees from the BOOK IL 291 By its beino; oval the Moon is of another fort,and remoter from the Moon beiow than above,I conclude, that it v^cis made by Refradlion infome fort of Hail or Snow floating in the Air inan horizontal pofture, the refra<5ting Angle beingabout 58 or 60 U 2 THE ^ 1 ©^ m i 1 >^ THE THIRD BOOK O F OPTICKS PART 1. Ohfervations concerning the Inflexions ofthe Rays of Lights and the Coloursmade thereby. RIMALDO has informd us, thatif a beam of the Suns Light be let in-to a dark Room through a very fmallhole, the Shadows of things in thisLight will be larger than they ought to be ifthe Rays went on by the Bodies in ilrait Lines, and
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