An introduction to the study of colour vision (1915)
Parsons, John Herbert, Sir, 1868-1957 · Cambridge University Press · leaf 95
THE FIELD OF VISION FOR COLOURS 75 Fig. 28 shows the fields with red . . . . 670-5 fxfx 0-27 foot-candle vellow 3-95 589-2 „ 1-89 508-5 „ oreen blue . . 036 460-3 „ RIGHT. 0 … 165 165 180 Fig. 28. The fields of vision for spectral colours with moderate illumination (l> light = 3-95 foot-candles at the screen). (Almey.)
Color vision
Internet Archive · Gerstein - University of Toronto · Public domain (published before 1931). Free to use for anything.
