It does not at all follow that the intelligent physician who has learnt how to treat successfully the illnesses of adults, has only to modify his plans a little, to diminish the proportions of his doses, for the application of his knowledge to our little sons and daughters. Some of their diseases are peculiar to themselves; other diseases, common to us all, take a form in children varying as much from their familiar form with us as a child varies from a man. Different as the ways are, or ought to be, by which we reach a fault in a child's mind, and reach a fault in the mind of an adult; so, not less different, if we would act successfully, should be our action upon ailments of the flesh. There is another thing, also, which puzzles the physician who attends on children. He comes to us when we are ill, and questions us of this symptom, and of that; and on our answers he is taught, in very many cases, to base a large part of his opinion. The infant can only wail; the child is silenced by disease; or, when it answers, wants experience, and answers incorrectly. Again, for life or death, all the changes in the sickness of a child are commonly very rapid: so rapid, that a child which suffers under an acute disease should be seen at least every five or six hours by its medical attendant. He knows this quickness of action; he knows how swiftly and how readily the balance may be turned upon which hang life and death. He may have been to Paris or to Vienna, and have studied in an hospital for children; and, out of his experience, he may know how to restore the child whole to the mother's bosom. But all English students can not go abroad for this good knowledge; nor is it fit that they have need to do so. They have need at present. In a rough way, English practitioners of medicine no doubt administer relief to many children; but, that they are compelled to see those perishing continually whom a better knowledge might have saved, none are more ready than themselves--the more skillful the more ready--to admit and to deplore. The means of studying the diseases of children in London have been confined to one dispensary, and the general hospitals. In these, the hours, the management, and discipline are not readily adapted to the wants of children. It was found, when a committee of the Statistical Society, in 1843, inquired into such matters, that only one in a hundred of the inmates of hospital wards was a child suffering from internal disease. Can we wonder, then--when we call to mind the peculiar characteristics of disease in a child, and the sagacity and close observation they demand--can we wonder that the most assiduous students, growing into medical advisers, can in so many cases, do no more than sympathize with the distress of parents, look at a sick child's tongue, feel its pulse, send powders, and shake their heads with vain regret over the little corpse, around which women weep so bitterly?