At the convention of the American Osteopathic Association held in Boston in 1918, I gave a short talk on the above subject, and during the day after I had given the lecture, two women and one man, graduate osteopaths, asked me if I really meant to convey the impression that we actually gave osteopathic treatments to recent surgical cases. I do not know whether I convinced them or not, but I do know that they convinced me that there are people practicing osteopathy who have absolutely no concept of its merits and underlying principles. To my surprise I have found that a great many osteopaths who consider themselves absolutely “pure” are just a bit startled at the thought of handling post-operative complications by treatment. These are invariably fellows who have had most of their experience in office work, and who do not come in contact with acute cases. Still it is difficult to conceive how a man can believe that osteopathy is specific for certain diseased conditions and not for others. As a matter of fact osteopathic treatment has not proved itself more satisfactory in any field of therapeutics than it has in post-operative conditions. The common post-operative conditions are pneumonia, pleurisy, backache and headache, nephritis, vomiting, neuritis, phlebitis. Taking up these subjects and discussing the least serious first we would of necessity discuss pneumonia last, as it is the most serious, and is less influenced by other conditions. It will also serve to illustrate many of the details in treatment. We will therefore briefly take up the other conditions and then discuss pneumonia more fully. Vomiting We believe there is no question that a good part of the prevention of anesthetic vomiting is in the preparation of the patient, including a good cleaning out of the bowels without debilitating cathartics. In other words, the vomiting is increased if the alimentary tract is loaded, or if on the other hand it has been irritated to the extent of losing its tone. Combining a careful preparation with a straight ether anesthesia and osteopathic treatment to the neck and splanchnics we have been able to eliminate any serious post-operative nausea. I do not recall a case in the last few years that vomited on the following day unless the condition for which they were operated was one that essentially in itself would cause vomiting; for instance if the patient had peritonitis and had been vomiting due to the toxic ileus. They might even vomit after the abdomen had been opened. This could hardly be called “post-operative” vomiting. The improvement in our records in post-operative vomiting is in proportion to our increased faith and use of the osteopathic treatment. Time and again patients have told us that they had taken anesthetics before and were sick from three to five days and even a week. Invariably we have been able to surprise these patients by the fact that they were sick less than a day.