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 45
r that of red ; we saythe hues are entirely different. The hue of the colour is,then, our third and last constant, or, as the physicist wouldsay, the degree of refrangibility, or the wave-length of thelight. In the preceding chapter it has been shown that thespectrum offers all possible hues,… … Fig. 9.—Eye-piece with Daltoifs Scalo. For the determination of the hue, an ordinary one-prismspectroscope can be used ; it is only necessary to add a littlecontrivance which enables the observer to isolate at will any THE CONSTANTS OF COLOUR. 37 small portion of the spectrum. This object is easily…
Color · Painting · Color in art
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
