Students' text-book of color, or, Modern chromatics : with applications to art and industry (1881)
Rood, Ogden N. (Ogden Nicholas), 1831-1902 · New York : D. Appleton · leaf 214
Fig. 89.—Arrangement of Disk andStrip for Photometric Comparison. Fig. 90.—Appearance of Disk in Rota-tion, the Strip being viewed througha Calc-Spar Prism. original strip ; but either of these images will be as brightas the grey disk, showing that the luminosity of the greydisk is just one half of…
Color · Painting · Color in art
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
