Color-blindness : its dangers and its detection (1879)
Jeffries B. Joy (Benjamin Joy), 1833-1915, Royal College of Physicians of Edinburgh · London : Boston · leaf 64
s it is, but is at the same time less 'saturated,' more whitish. The yelloio is, as it were, a combination of almost equal proportions of the fundamental colors that form white. Green is a strongly luminous but whitish green, which, in tending toward the blue, becomes more and more ' saturated ; '… … higher degree than the normal. A violet strongly luminous is sufficient to induce this green; but a feeble violet, although very sensible to the normal eye, is black to the color-blmd in question. " It is plain that the violet-blind, whose primitive colors are red and green, do not confuse these…
Color Vision Defects
Internet Archive · Royal College of Physicians in Edinburgh · Public domain (published before 1931). Free to use for anything.
