Colour vision : being the Tyndall lectures delivered in 1894 at the Royal Institute (1895)
Abney William de Wiveleslie Sir, 1843-1920, Royal College of Physicians of Edinburgh · London : Sampson Low, Marston · leaf 121
Luulinosity of a Feeble Spectrum. 103 fortuitous. As a matter of fact, in tliis we seem to liave come to the final curve for low luminosities, Fig. 25.
Color Perception
Internet Archive · Royal College of Physicians in Edinburgh · Public domain (published before 1931). Free to use for anything.
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