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The detection of colour-blindness and imperfect eyesight : with a table of coloured Berlin wools and sheet of test-types (1884)

Roberts, Charles, 1836-1901, University of Leeds. Library · London : J. & A. Churchill · leaf 25

An illustration from The detection of colour-blindness and imperfect eyesight : with a table of coloured Berlin wools and sheet of test-types, 1884, leaf 25

Colour vision defects · Colour perception tests

Internet Archive · University of Leeds Library · Public domain (published before 1931). Free to use for anything.

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