when person signaling is not seen, [536]
with objects in connection with personal action, [532]
Signs, Abbreviation in, [338]
, Arbitrary, [340]
, Conventional, [333], [336], [340]
deaf-mutes, of uninstructed, [277]
, diversities in, Classes of, [341]
, Forced, [336]
, Homomorphy of, with diverse meanings, [342]
, Mistaken, [336]