I really see no harm which can come of giving our children a little knowledge of physiology. . . . The instruction must be real, based upon observation, eked out by good explanatory diagrams and models, and conveyed by a teacher whose own knowledge has been acquired by a study of the facts; and not the mere catechismal parrot-work which too often usurps the place of elementary teaching.
Even the most eminent persons are subject to the laws of gravity.