To physicians who are students not alone of the manifestations of disease but also of the workings of human nature, there are few chapters in the history of medicine more interesting than those which record the welcome by each generation of the supposed advances in the treatment of disease. Each generation announced its cures for diseases, provided its remedies to relieve symptoms, and invented methods of treatment that seemed to put off the inevitable tendency toward dissolution. Yet few of these inventions and discoveries maintain their early reputations, and succeeding generations invariably abandon most of this supposed medical progress in favor of ideas of their own, which later suffer a like fate.