Headache, side-ache, back-ache, pains in the chest, and wandering pains in various parts of the body,--these are but a few of the painful ailments from which girls who are guilty of this sin suffer. Many of the tender spines which cause great solicitude on the part of parents and physicians, who fear that disease of the spine is threatening the life of a loved daughter, not infrequently originate in this way. Much of the hysteria which renders wretched the lives of thousands of young ladies and the fond friends who are obliged to care for and attend them, arises from sexual transgression of the kind of which we are speaking. The blanched cheeks, hollow, expressionless eyes, and rough, pimply skins of many school-girls are due to this cause alone. We do not mean by this to intimate that every girl who has pimples upon her face is guilty of secret vice; but this sin is undoubtedly a very frequent cause of the unpleasant eruption which so often appears upon the foreheads of both sexes. It would be very unjust, however, to charge a person with the sin unless some further evidence than that of an eruption on the face was afforded. The inability to study, to apply themselves in any way except when stimulated by something of a very exciting character, which many girls exhibit, is in a large proportion of cases due to the practice of which we are writing. Often enough the effects which are attributed to overstudy are properly due to this debasing habit. We have little faith in the great outcry made in certain quarters about the damaging effects of study upon the health of young ladies. A far less worthy cause is in many cases the true one, to which is attributable the decline in health at a critical period when all the vital forces of the system are necessarily called into action to introduce the activity of a new function.