It may be seen from the preceding remarks to what extent exercise is useful to young children. Unfortunately, the intellectual and moral necessities of our age cause physical education to be sacrificed in many respects. How many desires must necessarily be cherished, by confining the physical activity of young people, chained down as it were, hour after hour. How many men of mind have protested against the brief period of recreation allowed in our schools. Mr. Taillefer has done this in an excellent work published in 1824, on the improvement to be introduced in schools. This is true, also, of Pavet de Courtailles and Simon, (_Hygiene des Colleges, and Hygiene de la jeunesse_,) and in America by Dr. A. Brigham, of Hartford, whose work entitled, _The Influence of Mental Cultivation upon Health_, is full of judicious precept and sound logic. Gymnastic exercises, which are now beginning to be generally used in boys’ schools, and to be adopted in some seminaries for young ladies, compensate in some measure for their enervating education. Simon (of Metz) asserts that masturbation, formerly so destructive in the Orphan Asylum at Berne, has been expelled from it by introducing exercises. He adds, too, that this scourge has also disappeared from the schools of Switzerland, since mutual instruction was introduced, which, as is well known, obliges children to change their position frequently. A very active life may remedy a too great degree of lasciviousness. Hunting, particularly, has been recommended for this purpose. ‘Diana has been regarded as the enemy of Love,’ says Rousseau, “and the allegory is just: the languor of love only comes from sweet repose. Violent exercise extinguishes the tender emotions.” Rullier has known hunting to produce in a man forty years old, who was passionately addicted to it, a true anaphrodisia, which disappeared when the patient adopted, in accordance with the advice of his physician, another mode of life. Some exercises, however, produce a contrary effect, viz.: those which excite the genital organs directly. Riding in a carriage, especially if it jolts much, and still further riding on horseback, may act in this manner. This effect was known to the ancient authors. Aristotle speaks of it. All those accustomed to riding know that the motions of the horse often produce an erection, and sometimes an involuntary emission of semen. A similar occurrence may take place from riding in a carriage. Serrurier has known this to happen in himself.