Page:Elementary Color (IA gri c00033125012656167).djvu/90

 ere the best possible material expression of the six localities in the spectrum corresponding to the feeling or psychological perception of red, orange, yellow, green, blue and violet. Many subsequent experiments have apparently proved that practically the same six colors best serve the purpose of primaries from which to make all others by combination.

In accordance with these selections the educational colored papers have been made, and since that time an expert scientist has accurately located each of these colors in the spectrum by its wave length. Consequently after the children have come to know the six colors in the sun spectrum the six standard colors of the papers may be shown as the best imitations possible. In studying the six colors from the spectrum in a schoolroom it frequently happens that one color may be best seen on the floor, another on the wall or even the blackboard, and another on the ceiling, and after the order of the colors in the whole spectrum has been observed, it is well to get each color where it can be best secured.

When the spectrum has been studied so that the children have some idea of the six colors and their location relative to each other, give each of the children a package of the colored paper tablets, one inch by two inches, containing the eighteen normal spectrum colors, i. e., those in the central vertical column in the Chart of Pure Spectrum Scales, Page 41, and tell them to select from the eighteen the six which they have seen in the spectrum and which may be named to them as red, orange, yellow, green, blue and violet.