Opticks: Or, A Treatise of the Reflections, Refractions, Inflections & Colours of Light

Æther Angle Angles of Incidence appear Aqua fortis arithmetical mean Attraction beam of Light blue breadth Bubble cause Circles colour'd compounded copiously Crystal dark density Diameter dilated distance easy Reflexion easy Transmission edges emerge equal Experiment faint fall farther Fits of easy fix'd flected frangible greater green Heat hole Inch indigo Intervals Knives Lens less Lines Liquors luminous Medium middle mix'd mixture Motion Muscovy Numbers Object-glasses obliquely Observations Oil of Vitriol Opticks orange Orpiment Paper parallel Particles perpendicular Phænomena placed Plane Plates of Glass polish'd Prism PROP propagated Proportion purple rarer Rays of Light red Lead reflected Light refractive Power Rings of Colours Salt Salt of Tartar Sensorium Shadow side Sine of Incidence Sine of Refraction sorts of Rays Spectrum Speculum Substances Sulphur Sun's Light thence thickness thin Plates tion transmitted transparent unusual Refraction Vapour Vibrations violet Water yellow