Sentence and sentence-words, [296] et seq.

Sicard, Abbé, on syntax of gesture-language, [116]

Sight, superior use of sense of, by man, [366], [367]

Signs and sign-making. See [Language]

Simple ideas. See [Ideas]

Skeat, Professor, on Aryan roots of English, [266]

Skinner, Major, on intelligence of elephants, [98]

Smith, Rev. S., on ideation of deaf-mutes, [150]

Snakes, understanding by, of tones of human voice, [124]

Solomon, quoted, [195]