It behooves all those who have the care of children of both sexes, to bear their possible futures silently in mind; but all talk to them, or before them, all reading upon physiological subjects, during the period of development, should be forbidden, for the reasons that dictated the answer of the specialist; children should be instructed long before the developing period. I cannot tell what might be possible if we had to deal with girls in a normal state of health; but the girls and women of to-day are encouraged to a morbid consciousness of sex; and I believe, that all that relates to personal care should be ordered by those who are the natural guardians of the young, without unnecessary explanation or caution. When development begins, special treatment is required; not according to the sex so much as according to the individual; and no parent or teacher can dictate to another on general grounds. That school or family is an absolute failure which does not allow a margin large enough and loose enough for all possible contingencies, as regards boys or girls. If any one thinks the picture of youthful life which I have drawn an exaggerated one, let him read the books commonly published, descriptive of child-life, and once convinced, he will not wonder that the "number of invalid girls is such as to excite the gravest alarm." From all the cares imposed by dress, and from much of the weakness deduced from furnaces and high-storeyed houses, boys are exempted by their habits and general custom. If it is thought by any one that the boys of to-day are stronger than the girls, let them be subjected to the same regimen, and the result fairly reported. Let their steps be clogged by skirts, embroidered or plaited into death warrants; let them be kept at the piano or running up and down stairs when they should be in bed or at play; let them read sentimental novels or worse, and hang over the furnaces, instead of frolicking in the open air. We shall understand better, when this experiment is once tried, that God makes boy and girl alike healthy; but that social folly has, from the very first, set the girl at a disadvantage. Do sisters "imitate brothers in persistent work everywhere?" Nay, it is not the brothers whom they imitate, but their own steadfast, God-implanted instincts, which they thus attempt to work out. Girls cannot do two things well at a time. Then let them resign the life of fashion, excitement and folly, and give themselves to study, fresh air and an obedient life in a well-disciplined home. Every teacher of to-day will tell them, that those girls who go most regularly to school are healthier than those who lead desultory lives, and that among the students of any one school or college, the healthiest are generally those who work the hardest.