The usual treatment with bismuth sub-nitrate, cerium oxylate, sour wine and the other usual remedies were not used in any case or in any amount. No drugs whatever were employed. Backache and Headache There is practically no difference in the post-operative headache and the office headache. There is of course the usual multiplicity of causes, and as a matter of fact in this condition treatment can more nearly approach the ordinary office treatment, and the results are about the same. As for backache, we find that speed of operating and not keeping the patient under the ether too long has a marked influence. Also we have a four inch Seely mattress on the operating table which helps some. Treatment does the rest and does it effectively. For this complication even the ordinary nurse knows enough to give a treatment of some sort. Neuritis Nine times out of ten the post-operative neuritis is really a local osseous lesion, a slipped innominate, rib, vertebra, clavicle, biceps tendon or something of the sort, and responds quickly to a specific treatment. Phlebitis This complication usually comes on quite late after an operation and at first it is sometimes hard to differentiate it from a neuritis. Absolute rest of the involved part with lower spinal treatment gives relief, but under no circumstances should the affected part be freely moved while there is active inflammation. The reason for treatment of the lower spinal area is that practically always one of the saphenous veins is involved. Nephritis This complication is to a very big extent eliminated by a careful urinalysis prior to the operation, and careful preliminary treatment in indicated cases, and in other cases the postponement or if necessary complete elimination of the operation where it is not a case of life and death. Where the condition does appear we have found it the hardest of the post-operative complications to control. Indeed it is the only one that we have not found very easy to manage. We do not vary the treatment for a post-operative nephritis from what we would use in any ordinary case of nephritis. We have observed treatment of this condition in many cases under medical management, and while we are satisfied with the osteopathic treatment comparatively we are not yet satisfied that we have it developed to its greatest efficiency. Pleurisy This condition in nearly every instance can be corrected with one or two treatments of a twisted rib unless it is the pleurisy of a beginning pneumonia. As far as the pain is concerned the simpler type hurts as much as the one that is going to develop a real complication. For this reason relief obtained by a single treatment often seems little short of miraculous to the patient. Pneumonia