He wrote about the history of Medicine, a study which is much neglected at the present time. There is no generation of men so wise that they cannot with advantage adopt some ideas from the remote past, or, at least, find the teaching of their predecessors suggestive. Hippocrates was one of the first to recognize the _vis medicatrix naturæ_, and he always aimed at assisting Nature. His style of treatment would be known now as expectant, and he tried to order his practice "to do good, or, at least, to do no harm." When he considered interference necessary, however, he did not hesitate even to apply drastic measures, such as scarification, cupping and bleeding. He made use of the narcotics mandragora, henbane, and probably also poppy-juice, and as a laxative used greatly a vegetable substance called "mercury," beet and cabbage, and cathartics such as scammony and elaterium! He was able to diagnose fluid in the chest or abdomen by means of percussion and auscultation, and to withdraw the fluid by the operation of paracentesis, and he recognized also that the fluid should be allowed to flow away slowly so as to minimize the risk of syncope. He operated also for empyema. In regard to the methods of Hippocrates for the physical examination of the chest it is reasonable to suppose that the Father of Medicine indirectly inspired Laennec to invent the stethoscope. Hippocrates prescribed fluid diet for fevers, allowed the patients cold water or barley water to drink, and recommended cold sponging for high fever. In his writings will be found his views on apoplexy, epilepsy, phthisis, gout, erysipelas, cancer and many other diseases common at the present day.