It has been the request of the committee of arrangements that the president of this Society deliver an address on "The Progress, Problems, and Prospects in Medicine," at this our fiftieth anniversity. With due appreciation, we accept the honor conferred and bespeak your kind attention and indulgence. The subject is so broad and comprehensive that we can not do more than briefly consider the course of medical evolution, and some of the present medical problems and prospects. In the dim past so many theories, hypotheses and opinions emanated, from such a few facts that medical systems flourish in abundance. It would be impossible, in the brief time at our disposal, to describe the medical systems and dogmas of the past, so we will only briefly allude to these and pass on to a brief sketch of the progress in some of tne numerous branches of medical science for the last fifty years. The last decade has been a period of advancement without parallel in the world's history.