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Rh them on the palette, scrape them up, and lay them in gradations for use.

Of course in a single chapter we cannot enlarge on the laws of color. The amateur should, if possible, possess and study thoroughly some good book on the subject.

The following lines by Henry Hopley White were originally published in connection with a diagram illustrating the relation of the colors. They may help some in the study of color, and are convenient for reference.

"Blue—Yellow—Red—pure simple colors all (By mixture unobtained) we call: From these, in various combinations blent, All the colors trace their one descent, Each mixed with each—their powers combined diffuse New colors forming  hues; Yellow with red makes Orange, with blue—Green; In blue with red admixed, is Purple seen. Each of these hues in Harmony we find, When with its complimentary combined; Orange with blue, and green with red agrees, And purple tints near yellows always please. These secondary  produce, And Citrine—Olive—Russet—introduce; Thus green with orange blended forms citrine, And Olive comes from purple mixed with green; Orange, with purple mix'd, will russet prove; And, being subject to the rule above, Harmonious with each tertiary we view The complemental secondary hue. Thus citrine—olive—russet harmonize With purple—orange—green, their true allies. These hues, by white diluted Tints are made; By black, are deepened into darkest Shade. Pure or combin'd, the primaries all three, To satisfy the eye, must present be; If the support is wanting but of one, In that proportion harmony is gone; Should red be unsupported by due share Of blue and yellow pure—combin’d they are In green, which secondary thus we see, The harmonizing medium of all three. Yellow for light contrasts dark purple's hue, Its complemental, form'd of red and blue. Red most exciting is—let nature tell How grateful is, and soothing green's soft spell. So blue retires—beyond all colors cold,