relation of, to tone and gesture, [145-162];
importance of sense of sight to development of, [366], [367];
probable period and mode of genesis of in the race, [370-373]
Aryan languages. See [Languages]
Aryan race, civilization of, [272];
antiquity of, [273]
Audouin on a monkey recognizing pictorial representations, [188]
Axe, discovery of, by neolithic man, [214]
B
Barter only used by man, [19]