Colour-blindness

Abstract

IN the summary of the case of Mr. John Trattles published in NATURE of January 27 the expression is used:—“Dr. Ettles, who had examined Mr. Trattles, and was of opinion that he was not colour-blind, was also present.”

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ETTLES, W. Colour-blindness. Nature 82, 398 (1910). https://doi.org/10.1038/082398a0

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