Colour measurement and mixture. Published under the direction of the Committee of General Literature and Education appointed by the Society for Promoting Christian Knowledge (1891)
Abney, William de Wiveleslie, Sir, 1843-1920, Society for Promoting Christian Knowledge (Great Britain). General Literature Committee · London: Society for promoting Christian knowledge; New York, E. & J. B. Young & co. · leaf 172
f thesmall slit with a right-angled prism In front to deflectthe beam from the top spectrum, where two spectraare produced (see Fig. 16, p. 97), a single spectrum COLOUR MEASUREMENT AND MIXTURE. 169 is used, with a right-angled prism of such a sizethat it deflects half of it, which is again… … Fig. 38.—Chromatic Circle. together with a white stripe caused by their over-lapping. The two coloured stripes are comple-mentary one to the other. By moving the prismalong the spectrum various coloured stripes can beformed, in some cases one being much less luminousthan the other, and yet they are…
Color
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