A class-book of color : including color definitions, color scaling, and the harmony of colors (1895)
Maycock, Mark M · Springfield, Mass. : Milton Bradley Co. · leaf 63
...,...-..,: ■■ 53 Aids in Teaching Color. PrisWt A small glass prism is useful in showing that sunlight iscomposed of, and may be separated into the Normal or Spectrumcolors. Such a prism may be bought for a few cents. Colored CrayOllS. For purposes of illustation of the color workupon the…
Color · Color guides
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.