The following Lectures, in an abridged form, were delivered by me at the Schools of St. George's Hospital, and I now publish them with the hope that they may serve to some extent as a handy book concerning Insanity, on which subject there exist in our language few works of the character of a text-book. Written for students, they make no claim to be a complete treatise on Psychology; neither have all questions connected with Insanity been dis cussed ih them — such as the management of asylums, the problem of dis posing of the crowds Of our chronic patients, or of am ending the present Lunacy law.