Section I. - Hallucinations more frequent in dementia than is generally supposed - To what may the fact be attributed - Division of dementia into monomaniac and maniac, complete and senile - Abstract of hallucinations in dementia - Case of monomaniac dementia - Case of maniac dementia - Difficulty of distinguishing the shades of difference - Hallucinations may be of an intermittent character - Case of complete dementia - Case of senile dementia - Recapitulation.

Section II. - Hallucinations exist in dementia with general paralysis - Abstract - Cases - Recapitulation.

Section III. - Hallucinations viewed in relation to imbecility, idiotism, and cretinism - They may exist in the first, but they are never observed in the last two - Recapitulation.