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In fact, colour blindness was known, for a considerable time during the last century, as 'Daltonism', since it was through the publication of Dalton's self-observations that for the first time general attention was drawn to this phenomenon. The Onlooker's Philosophic Malady
And finally I tried to bring the results of these self-observations into relation with the results of those experiments. It was here that the opposite of the hypothesis which I had presupposed suggested itself to me with surprising force.
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