Color-blindness : its dangers and its detection (1880)
Jeffries, B. Joy (Benjamin Joy), 1833-1915 · Boston : Houghton, Osgood and Company · leaf 61
se, but more 'satu- rated ' than normal violet. The tints most luminous, and at the same time most ' saturated,' which must constitute the types of the j^rimitive colors of the green-blind, are orange (or its immediate neighbor in the spectrum, red) and indigo- blue. Now, orange is a color which,… … times 'red 'and sometimes 'yellow.' We will add to this description the same remark made about red-blindness. In green-blindness the same organ is also found affected by spectral red and green light. Red and green are then per- ceived by the green-blind in the same way, or, in other words, are to…
Color Vision Defects
Internet Archive · University of California Libraries · Public domain (published before 1931). Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-247-127.webp)
