Abstract
MR. WIILMER has replied1 to Prof. H. Hartridge (and incidentally to me, when I had made the same point in discussion) that the impossibility of obtaining greens and yellows by mixtures of extreme red and blue might be due to the impossibility of so obtaining high enough intensities to evoke a yellow or green sensation, rather than indicating the incorrectness of his (Mr. Willmer's) theory. Since then, the following simple and, I believe, crucial, experiment was tried.
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References
NATURE, 151, 632 (1943).
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CRAIK, K. Physiology of Colour Vision. Nature 151, 727–728 (1943). https://doi.org/10.1038/151727a0
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DOI: https://doi.org/10.1038/151727a0
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