A Treatise on Domestic Economy; For the Use of Young Ladies at Home and at School

and ill-ventilated apartment, loses much of his power to feel and to speak, while the audience are equally reduced, in their capability of attending. The teacher, who confines children in a close apartment, diminishes their ability to study, or to attend to his instructions. And the person, who habitually sleeps in a close room, impairs his mental energies, in a similar degree. It is not unfrequently the case, that depression of spirits, and stupor of intellect, are occasioned solely by inattention to this subject. Another cause of mental disease, is, the excessive exercise of the intellect or feelings. If the eye is taxed, beyond its strength, by protracted use, its blood-vessels become gorged, and the bloodshot appearance warns of the excess and the need of rest. The brain is affected, in a similar manner, by excessive use, though the suffering and inflamed organ cannot make its appeal to the eye. But there are some indications, which ought never to be misunderstood or disregarded. In cases of pupils, at school or at college, a diseased state, from over action, is often manifested by increased clearness of mind, and ease and vigor of mental action. In one instance, known to the writer, a most exemplary and industrious pupil, anxious to improve every hour, and ignorant or unmindful of the laws of health, first manifested the diseased state of her brain and mind, by demands for more studies, and a sudden and earnest activity in planning modes of improvement for herself and others. When warned of her danger, she protested that she never was better, in her life; that she took regular exercise, in the open air, went to bed in season, slept soundly, and felt perfectly well; that her mind was never before so bright and clear, and study never so easy and delightful. And at this time, she was on the verge of derangement, from which she was saved only by an entire cessation of all her intellectual efforts. A similar case occurred, under the eye of the writer, from over-excited feelings. It was during a time of unusual religious interest