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 92
ve, say a card Fig. 14.—Measurement of the Intensity of Rays reflected from whiteand coloured surfaces. disc three inches in diameter, painted with the pig-ment whose reflective power has to be measured,and place it on a rotating apparatus with blackand white sectors of say five inches diameter,… … go COLOUR MEASUREMENT AND MIXTURE. and white, and at the same time on the pigmenteddisc, it is probable that either one or other will bethe brighter. By moving the slit along the spectrumit is evident, however, that a colour can be foundwhich is equally reflected from them both whilstrotating. Take…
Color
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
