Words fail to convey the lesson of this case to others with any thing like the force that the observation of it conveyed its moral to those about Miss F----, and especially to the physician who watched her career through her educational life, and saw it lead to its logical conclusion of invalidism and thence towards recovery, till life ended. When she finished school, as the phrase goes, she was considered to be well. The principal of any seminary or head of any college, judging by her looks alone, would not have hesitated to call her rosy and strong. At that time the symptoms of failure which began to appear were called signs of previous overwork. This was true, but not so much in the sense of overwork as of erroneously-arranged work. While a student, she wrought continuously,--just as much during each catamenial week as at other times. As a consequence, in her metamorphosis of tissue, repair did little more than make up waste. There were constant demands of force for constant growth of the system generally, equally constant demands of force for the labor of education, and periodical demands of force for a periodical function. The regimen she followed did not permit all these demands to be satisfied, and the failure fell on the nervous system. She accomplished intellectually a good deal, but not more than she might have done, and retained her health, had the order of her education been a physiological one. It was not Latin, French, German, mathematics, or philosophy that undermined her nerves; nor was it because of any natural inferiority to boys that she failed; nor because she undertook to master what women have no right to learn: she lost her health simply because she undertook to do her work in a boy's way and not in a girl's way. Let us learn the lesson of one more case. These details may be tedious; but the justification of their presence here are the importance of the subject they illustrate and elucidate, and the necessity of acquiring a belief of the truth of the facts of female education. Miss G---- worked her way through New-England primary, grammar, and high schools to a Western college, which she entered with credit to herself, and from which she graduated, confessedly its first scholar, leading the male and female youth alike. All that need be told of her career is that she worked as a student, continuously and perseveringly, through the years of her first critical epoch, and for a few years after it, without any sort of regard to the periodical type of her organization. It never appeared that she studied excessively in other respects, or that her system was weakened while in college by fevers or other sickness. Not a great while after graduation, she began to show signs of failure, and some years later died under the writer's care. A post-mortem examination was made, which disclosed no disease in any part of the body, except in the brain, where the microscope revealed commencing degeneration.