1860. This work is a history and explanation of apparitions, visions, dreams, ecstasy, magnetism and somnambulism. The subject of hallucinations is one of universal interest. Contents: definition and divisions of hallucinations; hallucinations coexisting with sanity; hallucinations involving insanity; hallucinations in their relation to illusions; hallucinations in monomania, stupidity, mania, dementia and general paralysis; in delirium tremens; in nervous diseases not constituting insanity; in nightmare and dreams; in ecstasy, animal magnetism and somnambulism; in febrile, inflammatory, acute, chronic and other diseases; causes of hallucinations; hallucinations in relation to psychology, history, mortality and religion; treatment; hallucinations in relation to medical jurisprudence.