, Oral language, not proportioned to development of, [293], [314]
, Permanence of, [329]
, Power of, compared with speech, [347], [349]
, Surviving in gesture, [330]
, Symmorphs in, [343]
, Synonyms in, [341]
, Systematic use of, distinguished from uniformity of, [330]
, Theories of Indians, respecting the, [313]
Silence, Sign for, [304]