A Treatise on Optics; or, light and sight, theoretically and practically treated; with the application to fine art and industrial pursuits |
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achromatic acid actinic angle of incidence aperture axis blue body called camera caustic centre cloth colours combination concave mirror convex lens cornea crown crown-glass crystal crystalline crystalline lens curvature diameter diaphragm direction dispersive power diverging double refraction Edition Engravings equal eye-glass Fcap flint glass focal distance focal length foci focus f gilt edges green heliostat horizontal illumination Illustrations inches inclined index of refraction indigo lamp lantern lenses luminous magnifying power meniscus microscope object object-glass opaque orange oxyhydrogen parallel rays passing pencil perpendicular photographic picture placed plane plano-convex plano-convex lens plate polarised prism produced radii radius ray of light reflected reflector reflexion refracted rays refrangible retina screen screw seen shown in Fig side Sir David Brewster solar space spectrum spherical aberration substances telescope tion transparent tube violet visible vitreous humour Vols white light yellow