, Theories respecting the signs of, [313]
Innuits, Sign language of, [307]
Inquiry, Signs for, [291], [297], [303], [447], [480], [486], [494]
Insult, Sign of, [304]
Interjectional cries, [283]
Interrogation, Mark of, in sign language, [367]
Invention of new signs in sign language, [387]
Involuntary response to gestures, [280]
Isolation, Loss of speech by, [278]