_10th._--M. T. Her mother was of sound mind. Her father was in a melancholic state for two years, before she was born, but this was afterwards dissipated by active employment. M. T. has two brothers, younger than herself, who have been attacked with insanity, neither of whom have recovered. She has two sisters, some years older than herself, these have never been deranged. M. T. has had nine children. The three first have been melancholic. The youngest, at the age of five years, used to imagine she saw persons in the room covered with blood, and other horrible objects, she afterwards became epileptic and died. The youngest of her three first children has been married and had three children, one of whom is afflicted with chorea Sancti Viti, and another is nearly an ideot. Of the causes termed moral, the greatest number may, perhaps, be traced to the errors of education, which often plant in the youthful mind those seeds of madness which the slightest circumstances readily awaken into growth. It should be as much the object of the teachers of youth, to subjugate the passions, as to discipline the intellect. The tender mind should be prepared to expect the natural and certain effects of causes: its propensity to indulge an avaricious thirst for that which is unattainable, should be quenched: nor should it be suffered to acquire a fixed and invincible attachment to that which is fleeting and perishable. Of the more immediate, or, as it is generally termed, the proximate cause of this disease, I profess to know nothing. Whenever the functions of the brain shall be fully understood, and the use of its different parts ascertained, we may then be enabled to judge, how far disease, attacking any of these parts, may increase, diminish, or otherwise alter its functions. But this is a degree of knowledge, which we are not likely soon to attain. It seems, however, not improbable, that the only source, from whence the most copious and certain information can be drawn, is a strict attention to the particular appearances which morbid states of this organ may present. From the preceding dissections of insane persons, it may be inferred, that madness has always been connected with disease of the brain and of its membranes. Having no particular theory to build up, they have been related purely for the advancement of science and of truth.