Collecting instinct,
141
Color,
liking for, 183;
circle, 207;
cone, 209;
pyramid, 209;
sense, 204-228;
theories, 220-224;
tone, 206-207, 213-215;
triangle, 217;
zones, 211-212;
mixing, 214-217
Color-blindness,
209-211
Colored hearing,
376
Combination,
80, 135, 140, 148, 260-261, 299, 301, 306-308, 311, 323-326, 334, 479, 519;
law of, 263-264, 398-417, 431-432, 468