Abstract
THE important article in NATURE of September 5 (p. 438) will have been read by all friends of education with deep and melancholy interest.
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HEYES, J. The Testing of Colour-Blindness. Nature 40, 572 (1889). https://doi.org/10.1038/040572b0
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DOI: https://doi.org/10.1038/040572b0
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