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Colour vision; being the Tyndall lectures delivered in 1894 at the Royal Institute (1895)
Abney, William de Wiveleslie, Sir, 1843-1920 · New York, W. Wood & Co. · leaf 169
Ltiirdnosity Curves. 149 field for colour. This last is not recorded here. The spectrum colours were reduced to uniform luminosity Fig. 36.Color vision
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