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 81
As there is another posi-tion in the spectrum between the yellow and the 78 COLOUR MEASUREMENT AND MIXTURE. violet, which is of the same intensity, this must befound in the same manner, and be similarly noted.In the same way the luminosities of colours in thespectrum, equivalent to the white light… … Fig. ii.—Luminosity Curve of the Spectrum of the Positive Poleof the Electric Light. at each position the measure of the angular apertureof the sector which was used to give the equalluminosity or brightness to the white. By joiningthe ends of these ordinates by lines a curve isformed, which…
Color
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