Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 117
Diffusing curves. Holophane globe. Rays are split into b, e, reflected, then as e, f, g, refracted; and into b, c, d, refraoied. … Class A,Holophane globe, throw-ing rays mainly down-ward. Class B, rays mainly directed at an angle of 6o°. Class C,casting rays chiefly in alateral direction. BINOCULAR GLASSES 81
Inventions · Inventors
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