4. Color-circle. Gray crayon for centre, and five crayons spaced equidistant. This gives the invariable order, red, yellow, green, blue, purple. _Never use all five in a single design._ Either use a color and its two neighbors or a color and its two opposites. By mingling touches of any two neighbors, the intermediates are made and named yellow-red (orange), green-yellow, blue-green, purple-blue (violet), and red-purple. Abbreviated, the circle reads R, YR, Y, GY, G, BG, B, PB, P, RP. 5. Rosette. Red cross in centre, green leaves: blue field, black outline. Vary as in No. 2. 6. Rosette. Green centre and edge of leaves, purple field and black accents. Vary color of centre, keeping field two colors distant. 7. Plaid. Use any three crayons with black. Vary the trio. 8. Folding screen. Yellow field (lightly applied), green and black edge. Make lighter and darker values of each color, and arrange in scales graded from black to white. 9. Rug. Light red field with solid red centre, border pattern and edges of gray. This is called self-color. Change to each of the crayons. 10. Rug. Light yellow field and solid centre, with purple and black in border design. Vary by change of ground, keeping design two colors distant and darkened with black. 11. Lattice. Yellow with black: alternate green and blue lozenges. Vary by keeping the lozenges of two neighboring colors, but one color removed from that of the lattice. For principles involved in these color groups, see Chapter III. PLATE III. COLOR STUDIES WITH TUNED WATER COLORS IN THE UPPER GRADES. Previous work with measured scales, made by the tuned crayons and tested by reference to the color sphere, have so trained the color judgment that children may now be trusted with more flexible material. They have memorized the equable degrees of color on the equator of the sphere, and found how lighter colors may balance darker colors, how small areas of stronger chroma may be balanced by larger masses of weaker chroma, and in general gained a disciplined color sense. Definite impressions and clear thinking have taken the place of guess-work and blundering. Thus, before reaching the secondary school, they are put in possession of the color faculty by a system and notation similar to that which was devised centuries ago for the musical sense. No system, however logical, will produce the artist, but every artist needs some systematic training at the outset, and this simple method by measured scales is believed to be the best yet devised. [Illustration: PLATE 2. Copyright 1907 by A. H. Munsell] [Illustration: PLATE 3. Copyright 1907 by A. H. Munsell]