Observations on Insanity with Practical Notes on the Disease and Description of the Pathological Changes in Dismemberment by John Heslam is a classic work dealing with the problems of insanity and its practical treatment. In the book, the author provides a detailed description of the disease, observes its symptoms and development, and also discloses the results of anatomical studies of patients with insanity. John Heslam, a highly respected medical specialist and researcher, made a significant contribution to the field of mental disorders, considering not only the theoretical aspect, but also the practical methods of treating such patients. His book contains invaluable observations that help to understand the complex aspects of insanity and the recognition of its manifestations. Observations on Insanity with Practical Notes on the Disease and Description of Pathological Changes in Dismemberment is an important source of information for medical professionals, medical students, and anyone interested in mental health problems and the treatment of mental disorders.