Opticks:

Æther Angle Angle of Incidence appear Aqua fortis arithmetical mean arithmetical progression Attraction Axis beam of Light blue Bodies breadth Bubble cause Circles colour'd compound concave convex copiously Crystal ction dark Degrees density Diameters dilated distance edges emerge equal Experiment faint fall farther fide Fits of easy fix'd fracted frangible Fringes greater green hole homogeneal Light illuminated Image Inch Inci indigo Knives length Lens less lours Medium middle mixture Motion Object-glasses oblique Observations Oil of Vitriol Opticks orange parallel Particles pass perpendicular placed Plane Plates of Glass proportion rarer Rays of Light reflected Light Refra refrangible Rays Rings of Colours Salt Salt of Tartar second Prism Shadow Sine of Incidence Sine of Refraction sorts of Rays Spectrum Speculum stance Sun's Light Surface thence ther thickness thin Plates third tinged tion transmitted transparent tween unusual Refraction violet Water yellow