Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 727
f thepersistence of visual impression, each color is spread overthe whole area of the circle. This method was first employedby Newton to show that white light might be produced bythe union of what he called seven primary colors, but waslater extended to the systematic study of color vision by 716… … position is desired is placed atthe center, with sectors of blackand white, if necessary, and theproportions of the fundamentalcolors altered until, when thewhole is whirled, the outer ringappears as a satisfactory matchto the center. Fig. 463 shows a particularcase in which it was found that Fig.…
Physics
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