Activity, creative (see Creative activity); mental, [72-76]; physical, [69-72]; social, [108-09].

Æsthetic experience, [341-42]; and form, [346-51], [358]; in industry, [342]; in science, [63]; sense satisfaction basis of, [345-46]; standards, effect of custom on, [105], [361]; value of science, [63], [375]; values, [351-56]; vs. moral values, [353]; vs. practical values, [342-45]. See also Art.

Affection. See Love.

Age, influence of on learning, [12], [32].

Altruism, [158-59].

Ambition, [156].

Animal, instincts compared with human, [5]; man as an, [1]; man a social, [81].

Appreciation. See Æsthetic.

Aristocracy, [184].

Aristotle, [45], [95], [176], [308], [435], [437], [438], [439], [444], [447], [458].