Newton never exhibited any very great range of faculty till he commenced the study of the mathematics; and Dean Swift, the great wit and philosopher, is said to have been rather a dull boy. Now then, just at the period when the reasoning faculties are about developing themselves--when a new intellectual apparatus is just coming into play, by which we are capable of achieving at school, in one or two years, more than we have done by all our past labors--the girl is taken from her studies, enters into society, plunges into all the scenes of gaiety and fashion, and is frequently married before that age at which the boy is sent to college. It is impossible then, under the prevalence of such a system as this, to give an education at all scientific to the female. Her mind at school is not sufficiently developed to receive such an education. You frequently find our female teachers professing to teach the higher branches of science, such as chemistry, natural philosophy, moral and mental philosophy, and political economy. I do not pretend to call in question the capacity of such teachers, or their ability to teach what they profess to do; but I do assert that most of our young ladies are not competent at the time they are sent to school to acquire such knowledge. They skip, at so early a period of life, as lightly and fantastically over the buried treasures of science, as they would over the floor of the ball room. I have never known an individual, no matter how apparently bright his intellect--no matter how much Latin and Greek, and Grammar and English he had studied, who was capable, at the age of sixteen, of mastering the abstruse principles of the philosophy of the human mind. Such a science as this absolutely requires a development of the higher powers of the mind, before it can be studied with any degree of success; and that development very rarely takes place before the age of seventeen, no matter how stimulating may have been the previous education of the youth.