There can be little doubt but that ignorance on the part of parents and teachers, is the principal cause that leads to the too early and excessive cultivation of the minds of children, and especially of such as are precocious and delicate. Hence the necessity of imparting instruction on this subject to both parents and teachers, and to all persons who are in any way charged with the care and education of the young. This necessity becomes the more imperative from the fact that the cupidity of authors and publishers has led to the preparation of "children's books," many of which are announced as purposely prepared "for children from _two_ to _three_ years old!" I might instance advertisements of "Infant Manuals" of botany, geometry, and astronomy! In not a few isolated families, but in many neighborhoods, villages, and cities, in various parts of the country, children _under three years of age_ are not only required to commit to memory many verses, texts of Scripture, and stories, but are frequently sent to school for six hours a day. Few children are kept back later than the age of _four_, unless they reside a great distance from school, and some not even then. At home, too, they are induced by all sorts of excitements to learn additional tasks, or peruse juvenile books and magazines, till the nervous system becomes enfeebled, and the health broken. "I have myself," says Dr. Brigham, "seen many children who are supposed to possess almost miraculous mental powers, experiencing these effects and sinking under them. Some of them died early, when but six or eight years of age, but manifested to the last a maturity of understanding, which only increased the agony of separation. Their minds, like some of the fairest flowers were 'no sooner blown than blasted;' others have grown up to manhood, but with feeble bodies and disordered nervous system, which subjected them to hypochondriasis, dyspepsy, and all the Protean forms of nervous disease; others of the class of early prodigies exhibit in manhood but small mental powers, and are the mere passive instruments of those who in early life were accounted far their inferiors."