[Illustration: FIG. 23 C. D. M.]

There are certain general laws by which color may be pleasingly
disposed, but it must be borne in mind that it ought to be disposed
naturally as well. By a "natural" scheme of color, I mean one which
is consistent with a natural effect of light and shade. Now the
gradation from black to white, for example, is a pleasing scheme,
as may be observed in Fig. 24, yet the effect is unnatural, since
the sky is black. In a purely decorative illustration like this,
however, such logic need not be considered.

[Illustration: FIG. 24 D. A. GREGG]

[Side note: _Principality in the Color-Scheme_]

Since, as I said before, color is the factor which makes for the
unity of the result, the first principle to be regarded in its
arrangement is that of Principality,--there must be some dominant
note in the rendering. There should not, for instance, be two principal
dark spots of equal value in the same drawing, nor two equally
prominent areas of white. The Vierge drawing, Fig. 25, and that
by Mr. Pennell, Fig. 5, are no exceptions to this rule; the black
figure of the old man counting as one note in the former, as do
the dark arches of the bridge in the latter. The work of both these
artists is eminently worthy of study for the knowing manner in
which they dispose their values.

[Illustration: FIG. 25 DANIEL VIERGE]

[Side note: _Variety_]