Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 292
avor-ably situated in galleries. Inthe trades the polariscopehas proved useful in detect-ing strains in glass. By opti-cians, it has for years beenrecognized as a test for thegenuineness of Brazilian peb-ble lenses for spectacles. Ithas also proved of great uti-lity to the microscopist in… … ¥^^ f: A. Wheatstones Polar Clock. Other metals. The color of a glowing mass of metal variesaccording to its temperature, and a ray of the light whenpolarized is rotated by a plate of quartz to a degree depen-dent upon the color. The degree of rotation is measuredby the polariscope, and an…
Physics · Lantern projection · Electric apparatus and appliances
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