This brief statement only hints at the vital physiological truths it contains: it does not disclose them. Let us look at some of them a moment. Remember, that we are now concerned only with the first of these passages, that from a girl's childhood to her maturity. In childhood, boys and girls are very nearly alike. If they are natural, they talk and romp, chase butterflies and climb fences, love and hate, with an innocent abandon that is ignorant of sex. Yet even then the difference is apparent to the observing. Inspired by the divine instinct of motherhood, the girl that can only creep to her mother's knees will caress a doll, that her tottling brother looks coldly upon. The infant Achilles breaks the thin disguise of his gown and sleeves by dropping the distaff, and grasping the sword. As maturity approaches, the sexes diverge. An unmistakable difference marks the form and features of each, and reveals the demand for a special training. This divergence, however, is limited in its sweep and its duration. The difference exists for a definite purpose, and goes only to a definite extent. The curves of separation swell out as childhood recedes, like an ellipse, and, as old age draws on, approach, till they unite like an ellipse again. In old age, the second childhood, the difference of sex becomes of as little note as it was during the first. At that period, the picture of the

"Lean and slippered pantaloon,
With spectacles on nose, and pouch on side,
* * * * * * * * * *
Sans teeth, sans eyes, sans taste, sans every thing,"

is faithful to either sex. Not as man or woman, but as a sexless being, does advanced age enter and pass the portals of what is called death.

During the first of these critical periods, when the divergence of the sexes becomes obvious to the most careless observer, the complicated apparatus peculiar to the female enters upon a condition of functional activity. "The ovaries, which constitute," says Dr. Dalton, "the 'essential parts'[3] of this apparatus, and certain accessory organs, are now rapidly developed." Previously they were inactive. During infancy and childhood all of them existed, or rather all the germs of them existed; but they were incapable of function. At this period they take on a process of rapid growth and development. Coincident with this process, indicating it, and essential to it, are the periodical phenomena which characterize woman's physique till she attains the third division of her tripartite life. The growth of this peculiar and marvellous apparatus, in the perfect development of which humanity has so large an interest, occurs during the few years of a girl's educational life. No such extraordinary task, calling for such rapid expenditure of force, building up such a delicate and extensive mechanism within the organism,—a house within a house, an engine within an engine,—is imposed upon the male physique at the same epoch.[4] The organization of the male grows steadily, gradually, and equally, from birth to maturity. The importance of having our methods of female education recognize this peculiar demand for growth, and of so adjusting themselves to it, as to allow a sufficient opportunity for the healthy development of the ovaries and their accessory organs, and for the establishment of their periodical functions, cannot be overestimated. Moreover, unless the work is accomplished at that period, unless the reproductive mechanism is built and put in good working order at that time, it is never perfectly accomplished afterwards. "It is not enough," says Dr. Charles West, the accomplished London physician, and lecturer on diseases of women, "it is not enough to take precautions till menstruation has for the first time occurred: the period for its return should, even in the healthiest girl, be watched for, and all previous precautions should be once more repeated; and this should be done again and again, until at length the habit of regular, healthy menstruation is established. If this be not accomplished during the first few years of womanhood, it will, in all probability, never be attained."[5] There have been instances, and I have seen such, of females in whom the special mechanism we are speaking of remained germinal,—undeveloped. It seemed to have been aborted. They graduated from school or college excellent scholars, but with undeveloped ovaries. Later they married, and were sterile.[6]

The system never does two things well at the same time. The muscles and the brain cannot functionate in their best way at the same moment. One cannot meditate a poem and drive a saw simultaneously, without dividing his force. He may poetize fairly, and saw poorly; or he may saw fairly, and poetize poorly; or he may both saw and poetize indifferently. Brain-work and stomach-work interfere with each other if attempted together. The digestion of a dinner calls force to the stomach, and temporarily slows the brain. The experiment of trying to digest a hearty supper, and to sleep during the process, has sometimes cost the careless experimenter his life. The physiological principle of doing only one thing at a time, if you would do it well, holds as truly of the growth of the organization as it does of the performance of any of its special functions. If excessive labor, either mental or physical, is imposed upon children, male or female, their development will be in some way checked. If the schoolmaster overworks the brains of his pupils, he diverts force to the brain that is needed elsewhere. He spends in the study of geography and arithmetic, of Latin, Greek and chemistry, in the brain-work of the school room, force that should have been spent in the manufacture of blood, muscle, and nerve, that is, in growth. The results are monstrous brains and puny bodies; abnormally active cerebration, and abnormally weak digestion; flowing thought and constipated bowels; lofty aspirations and neuralgic sensations;

"A youth of study an old age of nerves."

Nature has reserved the catamenial week for the process of ovulation, and for the development and perfectation of the reproductive system. Previously to the age of eighteen or twenty, opportunity must be periodically allowed for the accomplishment of this task. Both muscular and brain labor must be remitted enough to yield sufficient force for the work. If the reproductive machinery is not manufactured then, it will not be later. If it is imperfectly made then, it can only be patched up, not made perfect, afterwards. To be well made, it must be carefully managed. Force must be allowed to flow thither in an ample stream, and not diverted to the brain by the school, or to the arms by the factory, or to the feet by dancing. "Every physician," says a recent writer, "can point to students whose splendid cerebral development has been paid for by emaciated limbs, enfeebled digestion, and disordered lungs. Every biography of the intellectual great records the dangers they have encountered, often those to which they have succumbed, in overstepping the ordinary bounds of human capacity; and while beckoning onward to the glories of their almost preternatural achievements, register, by way of warning, the fearful penalty of disease, suffering, and bodily infirmity, which Nature exacts as the price for this partial and inharmonious grandeur. It cannot be otherwise. The brain cannot take more than its share without injury to other organs. It cannot do more than its share without depriving other organs of that exercise and nourishment which are essential to their health and vigor. It is in the power of the individual to throw, as it were, the whole vigor of the constitution into any one part, and, by giving to this part exclusive or excessive attention, to develop it at the expense, and to the neglect, of the others."[7]

In the system of lichens, Nylander reckons all organs of equal value.[8] No one of them can be neglected without evil to the whole organization. From lichens to men and women there is no exception to the law, that, if one member suffers, all the members suffer. What is true of the neglect of a single organ, is true in a geometrical ratio of the neglect of a system of organs. If the nutritive system is wrong, the evil of poor nourishment and bad assimilation infects the whole economy. Brain and thought are enfeebled, because the stomach and liver are in error. If the nervous system is abnormally developed, every organ feels the twist in the nerves. The balance and co-ordination of movement and function are destroyed, and the ill percolates into an unhappy posterity. If the reproductive system is aborted, there may be no future generations to pay the penalty of the abortion, but what is left of the organism suffers sadly. When this sort of arrest of development occurs in a man, it takes the element of masculineness out of him, and replaces it with adipose effeminacy. When it occurs in a woman, it not only substitutes in her case a wiry and perhaps thin bearded masculineness for distinctive feminine traits and power, making her an epicene, but it entails a variety of prolonged weaknesses, that dwarf her rightful power in almost every direction. The persistent neglect and ignoring by women, and especially by girls, ignorantly more than wilfully, of that part of their organization which they hold in trust for the future of the race, has been fearfully punished here in America, where, of all the world, they are least trammelled and should be the best, by all sorts of female troubles. "Nature," says Lord Bacon, "is often hidden, sometimes overcome, seldom extinguished." In the education of our girls, the attempt to hide or overcome nature by training them as boys has almost extinguished them as girls. Let the fact be accepted, that there is nothing to be ashamed of in a woman's organization, and let her whole education and life be guided by the divine requirements of her system.

The blood, which is our life, is a complex fluid. It contains the materials out of which the tissues are made, and also the débris which results from the destruction of the same tissues,—the worn-out cells of brain and muscle,—the cast-off clothes of emotion, thought, and power. It is a common carrier, conveying unceasingly to every gland and tissue, to every nerve and organ, the fibrin and albumen which repair their constant waste, thus supplying their daily bread; and as unceasingly conveying away from every gland and tissue, from every nerve and organ, the oxidized refuse, which are both the result and measure of their work. Like the water flowing through the canals of Venice, that carries health and wealth to the portals of every house, and filth and disease from every doorway, the blood flowing through the canals of the organization carries nutriment to all the tissues, and refuse from them. Its current sweeps nourishment in, and waste out. The former, it yields to the body for assimilation; the latter, it deposits with the organs of elimination for rejection. In order to have good blood, then, two things are essential: first, a regular and sufficient supply of nutriment, and, secondly, an equally regular and sufficient removal of waste. Insufficient nourishment starves the blood; insufficient elimination poisons it. A wise housekeeper will look as carefully after the condition of his drains as after the quality of his food.

The principal organs of elimination, common to both sexes, are the bowels, kidneys, lungs, and skin. A neglect of their functions is punished in each alike. To woman is intrusted the exclusive management of another process of elimination, viz., the catamenial function. This, using the blood for its channel of operation, performs, like the blood, double duty. It is necessary to ovulation, and to the integrity of every part of the reproductive apparatus; it also serves as a means of elimination for the blood itself. A careless management of this function, at any period of life during its existence, is apt to be followed by consequences that may be serious; but a neglect of it during the epoch of development, that is, from the age of fourteen to eighteen or twenty, not only produces great evil at the time of the neglect, but leaves a large legacy of evil to the future. The system is then peculiarly susceptible; and disturbances of the delicate mechanism we are considering, induced during the catamenial weeks of that critical age by constrained positions, muscular effort, brain work, and all forms of mental and physical excitement, germinate a host of ills. Sometimes these causes, which pervade more or less the methods of instruction in our public and private schools, which our social customs ignore, and to which operatives of all sorts pay little heed, produce an excessive performance of the catamenial function; and this is equivalent to a periodical hemorrhage. Sometimes they produce an insufficient performance of it; and this, by closing an avenue of elimination, poisons the blood, and depraves the organization. The host of ills thus induced are known to physicians and to the sufferers as amenorrhœa, menorrhagia, dysmenorrhœa, hysteria, anemia, chorea, and the like. Some of these fasten themselves on their victim for a lifetime, and some are shaken off. Now and then they lead to an abortion of the function, and consequent sterility. Fortunate is the girls' school or college that does not furnish abundant examples of these sad cases. The more completely any such school or college succeeds, while adopting every detail and method of a boy's school, in ignoring and neglecting the physiological conditions of sexual development, the larger will be the number of these pathological cases among its graduates. Clinical illustrations of these statements will be given in another place.