Familiar Lectures on Scientific SubjectsAlex. Strahan, 1868 - 507 pages |
Other editions - View all
Common terms and phrases
action æther amount angle of incidence appear astronomers axis body bright calculation called centre circle coloured comet course crystal dark described diameter direction distance double refraction earth earthquake elastic elliptic equal fact feet force glass globe heat Iceland spar illumination inch incidence instance intensity interval lava length less light luminiferous ether luminous material matter measure medium metre miles minute molecules moon motion movement nature nearly object oblique observed optical orbit ordinary parallax parallel particles pass perihelion perpendicular phænomena phænomenon plane plate polarized portion present prism prismatic produce propagated proportion reflected reflexion refracted ray refraction refractive index result retina right angles rings round seen side space spectrum spot stars Sumbawa sun's suppose surface tail telescope theory thickness thing tints tion tourmaline undulation undulatory vapour velocity Vesuvius vibrations violent vis viva volcano wave weight whole