Chart of Pure Spectrum Scales Completed.
The entire mastery of these extreme tones will be quite difficult because they are so far removed from the standards, and the children can hardly be expected to recognize and name them when seen separately. If a pupil is able to correctly arrange them in connection with the other tones of the chart, his accomplishment will show a high grade of color perception. But these extreme tones are introduced because their use in the more advanced work of paper cutting and pasting produces stronger and more beautiful harmonies and a higher degree of color training than would result were the tints and shades nearer the standards in tone.
No detailed rehearsal of the lessons for this work is necessary to enable a teacher who has pursued the course of instruction thus far to complete it in a logical way, and relatively little time will be required by the pupils to become sufficiently familiar with these tones for practical purposes, because of their more acute color perception which will be developed at this period.