The History and Present State of Discoveries Relating to Vision, Light, and Colours. By Joseph Priestley ..: 11772 - 422 pages |
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alfo Alhazen almoſt alſo angle of incidence anſwer appear atmoſphere becauſe blue bodies cauſe circumſtances colours confequently confiderable convex denſity diſcovered diſcovery diſtance diſtinct diſtinguiſhed eſpecially experiments expoſed fame fays feem fhall fide fince firſt fome fpeculum fringes fubftances fuch fufficient fun's fuppofed glaffes glafs glaſs greateſt himſelf hiſtory hole hypothefis inch increaſe inftrument itſelf knives laſt leaſt lefs leſs luminous meaſure medium microſcope mirror Montucla moſt muſt Newton's Opticks obfervations object obliquely oppofite Opticks paffing particles paſs perfons philofopher phoſphorus plate poliſhed preſent prifm priſm publiſhed purpoſe rays of light reaſon reflected reflexion refractive power refrangible repreſent reſpect retina ſame ſays ſecond ſee ſeem ſeen ſeveral ſhadow ſhall ſhould ſmall ſome ſpace ſpot ſtars ſubject ſubſtances ſuch ſuppoſed ſurface teleſcope thefe theſe thickneſs thoſe Tranf tranſmitted tranſparent treatiſe uſe velocity vifion violet viſible yellow