Shelley, P. B., [46].

Shinn, Miss Milicent, [165], [167], [168], [173], [175], [195], [211], [218].

Shooter, Jos., [225], [230].

Shyness, recoil from, producing laughter, [205], [206], [228], [238].

Sidgwick, H., [386] note.

Sigismund, B., [165].

Simcox, G. A., [266].

Situation, as laughable, [96]–98, [117], [120], [317]; in comedy, [351].

Slaves, laughter of, [265], [266], [291].

Smile, the, physiological aspects of, [26], [165]; relation of, to laughter, [26], [28], [29], [168], [170], [174], [175], [193]; in animals, [161]–163, [170], [177]; first appearance of, in child, [164]–166, [168]; development of, [165], [188]; as expression of pleasure, [168], [183]; an inherited tendency, [170]; origin of, [171]–173.