The following cases are related by Professor Carpenter as occurring within his own knowledge. They are valuable as a warning to nursing mothers to avoid all exciting or depressing passions. A mother of several healthy children, of whom the youngest was a vigorous infant a few months old, heard of the death from convulsions of the infant child of an intimate friend at a distance, whose family had increased in the same manner as her own. The unfortunate circumstance made a strong impression on her mind, and being alone with her babe, separated from the rest of her family, she dwelt upon it more than she otherwise would have done. With her mind thus occupied, one morning, shortly after nursing her infant, she laid it in its cradle, asleep and apparently in perfect health. Her attention was soon attracted to it by a noise. On going to the cradle she found it in a convulsion, which lasted only a few moments, and left it dead. In the other case, the mother had lost several children in early infancy, from fits. One infant alone survived the usually fatal period. While nursing him, one morning she dwelt strongly upon the fear of losing him also, although he appeared to be a very healthy child. The infant was transferred to the arms of the nurse. While the nurse was endeavouring to cheer the mother by calling her attention to the thriving appearance of her child, he was seized with a convulsion, and died almost instantly in her arms. Under similar circumstances, a child should not be nursed by its mother, but by one who has reared healthy children of her own and has a tranquil mind. An interesting illustration of the powerful sedative action of the mother's milk--changed in consequence of great mental distress--upon the impressible nervous system of the infant, is furnished by a German physician. 'A carpenter fell into a quarrel with a soldier billeted in his house, and was set upon by the latter with his drawn sword. The wife of the carpenter at first trembled from fear and terror, and then suddenly threw herself furiously between the combatants, wrested the sword from the soldier's hand, broke it in pieces, and threw it away. During the tumult, some neighbors came in and separated the men. While in this state of strong excitement, the mother took up her child from the cradle, where it lay playing and in the most perfect health, never having had a moment's illness. She gave it the breast, and in so doing sealed its fate. In a few minutes the infant left off sucking, became restless, panted, and sank dead upon its mother's bosom. The physician, who was instantly called in, found the child lying in the cradle as if asleep, and with its features undisturbed; but all his resources were fruitless. It was irrevocably gone.'