The Premature Use of Mind. — A lesson might be derived from noticing the da maged health of many a boy and girl in their teens ; supposing them to have escaped from all the perils of an earlier cachexia : tracing the ailings of a period, that should be marked by peculiar health, and peculiar physical ca pability, to the unwise diversion of nervous .powers in the intellectual exertions, from the no less important business of building up firm and strong systems, fit to encounter the wear and tear of existence. Much of the dyspep sia, the biliousness, the headaches, the palpi tations, the sensitiveness to cold, the shortness of breath, the incapability of sustained exer tion, and the eventual hysteria, chlorosis, spinal curvature, and final disease of heart, lungs, or brain, that occurs between puberty and the age of forty years, may be directly referred to the premature and undue use of the faculties of the mind, without reference to the development and condition of the nervous organism, or to the powers and requirements of the system at large. It has been well no ticed, in illustration of the effects of an unwise or a premature exercise of the intellect, that Tasso, at the age of twenty-two, was the au thor of the greatest epic poem of modern i times, hut was always melancholy, or else de- j voured by passion, and died at the age of fifty- I one ; that Pascal, who also enjoyed a prema mature celebrity as an author, was always hy pochondriacal, ever imagining that he saw a gulf open at his side, and died at the age of thirty-nine ; that Byron, who T/rote so early, and so much, and so greatly as to originality and high desert, and in part so unhealthily and unwholesomely, was the victim of dyspep sia and hypochondriasis, and died, of diseased brain, in his thirty-seventh year ; that Pope, who notoriously began to write poetry at twelve years old, and became famous at sixteen, was the victim of extreme feebleness, morbid sen sitiveness to cold, dyspepsia^ head-ache, and eventual dropsy, whose life is well characteri zed as having been one long disease, and that he died in his fifty-eighth year. 