doing it correctly, a more difficult task is set them, and then another and another; and not until the pupils have, through many years of diligent application, mastered all the lessons in arithmetic, does he attempt to unfold to them the underlying mathematical principles.
In learning a trade, say that of a mechanic, the boy is not at first taught the principles of mechanics, but a simple tool is put into his hand and he is told how rightly to use it, and is then left to do it by effort and practice. As he succeeds in plying his tools correctly, more and more difficult tasks are set him, until, after several years of successful practice, he is prepared to study and grasp the principles of mechanics.
In a properly governed household, the child is first taught to be obedient, and to conduct itself properly under all circumstances. The child is not even told why it must do this, but is commanded to do it, and only after it has
