17. Harmonies of Sight.-Harmony of Colours. Light and
Shade. Lustre.
18. Muscular susceptibility of the Eye. Harmony of
Movements, Intervals, and Proportions. Laws of
Proportion; the German critics; D. R. Hay
37. The Ludicrous.-Causes of Laughter
38. All Incongruity is not Ludicrous. Degradation es-
sential to the Ludicrous.
reflecting Superior Power