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 199
owing this isby our colour patch apparatus. If we throw thereflected beam and the colourpatch on a square as before,and place a rather thinnerrod in front, so that the twoshadows lie on a backgroundof the combined white lightand spectral colours, on pass-ing a slit through the spec- fig. 45.-Method… … COLOUR MEASUREMENT AND MIXTURE. I97 decidedly of a blue hue ; if a green ray it will be ofa ruddy hue ; if a blue ray of a yellow hue; that is,all the contrast hues will appear to the eye to tendtowards a complementary tone to the spectral light.The kind of white light illuminating the shadow hasa…
Color
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