Color Top.

1. Maxwell discs of slit paper or cardboard, for studying primary and other color relations, can be obtained with small color tops, and larger color wheels, from Milton Bradley Co. and the Abbott Educational Co., New York City.

I. These discs arc easily made from water-color paper painted with tempera or show card colors. They should be slit from the edge to the center, so that they can overlap as desired when superimposed.

3. When spinning rapidly, the colors of the overlapping discs

metgc.

4. Light reflected from the surface of revolving discs creates \\\v

scnsation of colored light, not colored pigments. Light ultramarine blue and pale cadmium yellow spun together look almost pure white, not green. Vermilion and true emerald green produce a darkish yellow, not neutral gray.

D. Contrasting Colors In

Even Balance.

Strongly contrasting or complementary colors, repeated in equal quantities, are confusing and hard on the eyes.

COLOR AND ITS USE

These diagrams illustrate the Munsell System of Color Notation, and are reproduced through the courtesy of the International Printing Ink Corporation from Three Monographs on Color, a publication of unusual interest and beauty.

The countless hues, and their modifications, used in science, art. and industry required orderly arrangement, and some method of accurate identification. This need produced several color systems, of which A. H. Munsell's A System of Color Notation is the most widely used commercially.

A. 1. Hue indicates the spectral wave length of a color

and its position in the color circle. 2. In Munsell's notation, hue is indicated by its initial letter.