Post-operative cases have one advantage along with their disadvantage. While they have the shock of the operation to contend with, and the weakened condition from the disease for which they were operated, still except in extreme emergency they would not have been operated on unless they had a good heart and good kidneys and a good blood pressure, so that in cases in which we are most concerned in combatting pneumonia, we usually start with a patient who has those organs in a healthy condition. =First Post-operative Pneumonia Cases Treated Osteopathically.=—At the Chicago Convention in 1911, I reported the first post-operative pneumonia cases that had been treated osteopathically. I believe at that time that there had been only three cases. At that meeting I mentioned the fact that some of the doctors and some of the internes who treated those cases felt sure that they were not treating them properly because they could not get away from the idea that pneumonia needed strychnin and other drugs. One of these cases got well in three days from the developed lobar pneumonia symptoms. The results were so miraculous that the young man treating it began to doubt whether it could have been pneumonia. He could not understand how he, a senior student, could overcome this dreaded disease by merely working on the spine. He could not believe that osteopathy, a science that he had been able to learn himself, so easily could cure a condition that he had thought must be almost necessarily fatal. One of the weaknesses of osteopathy is the fact that there is no mysticism about it. It is so simple that any person with ordinary intelligence can learn to use it, and yet it is so simple that it takes an unusual intelligence to be able to grasp the fact that it is the therapeutic discovery of the age. Many, many times I have had young internes and students cure genuine lobar pneumonia and do it with such obvious ease that it caused them to wonder, in a way, if it really could be pneumonia. It is bred in our very tissues to look for some mysticism, something impossible to understand, something supernatural, something connected with the Unknown associated with the treatment of disease and accordingly it is just human nature to find it difficult to believe, even when we see it, that a simple method of treatment can actually effect a cure. Real pneumonia, as we understand it, is a consolidation of the lung tissues characterized by fibrosanguinous exudate into the pulmonary tissues and spaces, associated with one or more particular germs as exciting factors and proved by the physical tests and the character of the expectoration. How many cases have been cured that had not entered consolidation I do not know because up until the time of actual consolidation there may be a question as to whether or not they would have had pneumonia. I know that many cases with marked symptoms of pneumonia have failed to develop under treatment or the case has been aborted.