Abstract
PROF. PEDDIE states in his letter in NATURE of September 8, p. 362, that the facts that I have given as totally opposed to the trichromatic theory can be explained by it. If he will show how this can be done I can then deal with his explanations. Directly the trichromatic theory is put in a definite form its failure becomes evident. For example, it has been stated frequently by others that the construction of the trichromatic theory given to explain simultaneous and successive contrast will not explain colour blindness, and vice versa. There is no fact that directly supports the trichromatic theory. In numerous cases papers written to support the trichromatic theory are found on examination to give facts strongly adverse to it. Prof. Frank Allen has written a number of papers supporting the trichromatic theory. In a paper on the Primary Colour Sensations (Philosophical Magazine, vol. xxxviii., July 1919, p. 81) Prof. Allen writes: “But it is difficult to understand why the exceedingly complex region between λ·470μ, and λ·570μ should exhibit, as it does, persistency curves with only one elevation in the green.” The reader should note that it is only on the trichromatic theory that this region is complex. On my theory it is quite simple and the results should be as stated.
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EDRIDGE-GREEN, F. Colour Vision and Colour Vision Theories. Nature 112, 473 (1923). https://doi.org/10.1038/112473c0
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DOI: https://doi.org/10.1038/112473c0
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