Beale, Lionel S. (Lionel Smith), 1828-1906 · London, Harrison · leaf 72
through it, or they must be reflected upon its lowersurface from a mirror placed beneath it, and arranged at theproper angle. 23. Reflected Light.—The light employed may be ordinarydaylight, sunlight, or the light of a candle, or good lamp. Themost important modes of illuminating objects for…
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