Johnson, George Lindsay, 1854- · New York, E. P. Dutton and Co. · leaf 306
COLOURS on the other hand results, from the absence of all stimulation of those parts which are capable of responding to colour stimuli. Helmholtz constructed a scheme to illustrate the effect of stimulating the photo-chemical substances which produce the three colours in different degrees… … Fig. 30. — Scheme illustrating the Young-Helmholtz Theory of Colour Vision. The curves represent the intensity of stimulation of the three colour substances. little green and a mere trace of red. It will be noticed from the annexed figure (Fig. 30) that it is impossible to stimulate any one of the…
Color photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
