on language of savages in respect of abstraction, [350];
on absence of subjective personal pronouns in early forms of speech, [421]
Feejee language. See [Language]
Fire only made by man, [19]
Fitzgerald, P. F., on self-consciousness, [212]
Flight, capability of, in insects, reptiles, birds, and mammals, [156], [157]
Forbes, James, on intelligence of monkeys, [100]
Fox, intelligence of, [55], [56]
Frogs, understanding by, of tones of human voice, [124]
G