for a scheme of color standards,! which have also been the basis of several other efforts toward the same end, as the plates in Milton Bradley's "Elementary Color" and educational colored papers, Prang's charts of standard colors, Klinkseick and Valette's "Code des Couleurs," etc.; but while all these present a scientifi¬ cally arranged color-scheme and more or less adequate ^Titles of several books on the subject which are especially recommended to the lay student of chromatology are given at the end of this text.
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