Church, A. H. (Arthur Herbert), 1834-1915, Vincent Brooks, Day & Son, lithographer, Cassell & Company, publisher · London ; Paris ; New York ; Melbourne : Cassell and Company, Limited · leaf 75
. V. take a paper disc, painted with vermilion, and add to it,by means of one of Maxwells graduated white sectors,the above areas, or amounts of white (assuming the circleto be divided into one hundred degrees), each five partsof white added covering up five parts of vermilion Onrotating the… … Fig. 12. containing fifty parts of white in the hundred : the com-pound disc, when at rest, is shown in Fig. 12. A similarsector of black will yield ten corresponding shades ofvermilion : a grey sector will yield a broken scale often tones. But by neither of the processes do we ob-tain scales of…
Colors · Color · Kleuren · Kleurwaarneming · Kleurtheorie
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