On Hallucinations in Insanity

The hallucinations and illusions of melancholic monomania (lypemania of Esquirol) are characterized by fixity, intensity, and tenacity, as well as by expression, which distinguish them from those observed in acute delirium and mania. The integrity of the reasoning power, excepting always some obscured portions, "permits lis in most cases to analyse the phenomena and follow their modifications with great minuteness. The patient himself, when he is intelligent, may furnish very useful indications upon the return of his conceptions as sensations. Although in acute delirium and mania the false sensations are often painful and distressing, the nature of the intellectual disorder removes from