Two other men with names greatly celebrated among the ancients may be referred to here, as representatives of what may be termed the Natural History group of sciences. One of them was a contemporary of Plato, the other was a pupil of Aristotle. The first is the famous physician HIPPOCRATES B.C. 470-375), to whom is attributed the foundation of medicine as a science. The healing of wounds and the cure of diseases is an art, and as such must have been practised in some form at a period coeval with the existence of mankind. The successful practice of this art depends largely upon knowledge of the causes, symptoms, and course of diseases, and upon a knowledge of the anatomy and physiology of the human body.