As the precautionary rules which medical science has to offer are in many cases unknown, and in more numerous instances unheeded, injudicious marriages are constantly being formed. Children are therefore daily born into the world, with dispositions more or less marked towards hereditary affection. Much may even yet be done to stay the mischief commenced. Efforts to maintain the health of such infants cannot be instituted too early. By intelligent care, continued through life, the appearance of the disease may be suppressed, and in some cases the predisposition eradicated. The first attention should be directed to the nourishment of such an infant. It should not be brought up by hand. If it cannot be suckled by the mother, it must be placed at the breast of a healthy nurse. The child should be warmly clad, and carried daily in the open air, unless the weather is inclement. The use of the bath and other requisites to infantine health must not be lost sight of. This constant watchfulness over the well-being of the child should not be remitted during the whole period of youth. Great care ought also to be taken not to overexcite the brain by encouraging precocious exhibitions of talent. Active play m the open air with romping companions, will do more for the future of the child than any knowledge it can at an early age acquire with books. Much harm is done by competitive examinations about the period of puberty this is especially the case in those inheriting a disposition of epilepsy or consumption. These diseases are at this age most liable to appear, and the intense application and undue anxiety which attend such examinations may develop them those disposed to hereditary afflictions should extend then care of themselves even to the choice of their avocation. Such pursuits as are sedentary and exposed to the debilitating influence of impure, in-door air are to be avoided. So also are those which require at times exhaustive mental or bodily exertion. Regular exercise in the open air, by walking or riding, is of the utmost moment every day. Where there is a tendency to consumption, epilepsy, or insanity it is particularly valuable, and can do more than is generally sup-Dosed to avert them.