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 157
, one being that the quality of sunlightvaries, and therefore colour equations will not beaccurately comparable one with the other; and 154 COLOUR MEASUREMENT AND MIXTURE. the second is that the light reflected from the cardis not absolutely the same in all directions, and itcannot be… … Fig. 37.—Maxwells Curves of Colour Sensations. With this apparatus, then, Maxwell formedhis colour equations, but he fixed as the colourswhich may be called his standard colours, portionsof the spectrum which are certainly not pure, andhence he got curves which are net as perfect asthose of Koenig.…
Color
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