An introduction to the study of colour vision (1915)
Parsons, John Herbert, Sir, 1868-1957 · Cambridge [Eng.] University Press; New York, G. P. Putnam's Sons · leaf 73
elenburg) (Fig. 1), seems to point to someunderlying physiological fact of great significance. We shall return tothis point later. ^ Loc. cit. p. 21. 2 J. of Physiol, XXI. 12(». 1897. 56 COLOUR VISION As may be easily imagined there are many practical difficultiesabout the observations. Before… … 400 460 620 680 640 700 760 Fig. 17. Liiminosity curves determined by the flicker method (critical frequency readings).The upper curve i-epreseuts a briglit spectrum, the lower a dark spectrum, and themiddle curve one of intermediate intensity. (Haycraft.) At nightfall in the summer the order of…
Color vision
Internet Archive · Biodiversity Heritage Library · Public Domain Mark 1.0. Free to use for anything.
