Opticks

according Angle appear arise Attraction Axis beam became become blue Bodies Book breadth Bubbles cause changed Circles Colours compounded consequence continue contrary Crystal dark density Diameter distance distinct Earth easy edges emerge equal Experiment fall farther Feet Figure Fits Focus Fringes Glass greater green half Heat hole illuminated Image Inch Incidence inclined increased intermediate Intervals least length Lens less Light Lines manner means measured Medium middle Mixture Motion Nature Numbers Object obliquely Observations orange parallel Particles pass perpendicular placed Plane Plates Point Prism produced PROP Proportion Proposition reason reflected Reflexion Refraction refrangible Rays represent rest Rings round Salt Shadow side Sine of Incidence sometimes sorts of Rays Space Spectrum Speculum Spirit Substances successively Sun’s suppose Surface thence thickness thin things third transmitted transparent turned violet Water yellow