The subject of this paper will probably be regarded as uninteresting, so much having been said and written on it without producing any form of treatment that has appeared to modify much the course of pneumonia. More than one has mentally summed up the position with the thought: "We trust in the future." Yet we can not rest content with the present state of things. Osler calls pneumonia the "Captain of the Men of Death," and says it outranks consumption as a cause of death. At the Johns Hopkins Hospital the death rate in pneumonia is about 1 in 4. Of course, many of the patients come to the hospital only when the disease is far advanced and from most unfavorable surroundings.The Journalof the American Medical Association, in an editorial, quotes Dr. E. F. Wells' statistics published in 1902, in which it was shown that the mortality from