Researches in colour vision [electronic resource] : and the trichromatic theory (1913)
Abney, William de Wiveleslie, Sir, 1843-1920, Parsons, John Herbert, Sir, 1868-1957, donor, Institute of Ophthalmology, University College, London. Library Services · London : Longmans, Green and Co. · leaf 168
148 RESEARCHES IN COLOUR VISION gives the standard of whiteness to which the coloured beam is to be reduced. It is worthy of notice that when the white beam is entirely cut off, or made … very feeble, colour often seems absent from the mono- chromatic light, but is again perceived when the beam is brightened. This is especially the case with the red part of the spectrum. The strength of the
Ophthalmology · Eye · Color vision · Color Perception
Internet Archive · UCL Library Services, University College London (UCL) · Public domain (published before 1931). Free to use for anything.
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