Mrs. Y., æt. fifty-six, was sent to Dr. J.K. Mitchell by Professor Osler for treatment. She had all the usual intestinal derangements and discomforts attendant upon a floating kidney: constipation alternated with diarrhoea, or rather with a sort of intestinal incontinence; vague pains in the back, flanks, and stomach were frequent; attacks of acute pain began in the right hypogastrium and ran down to the symphysis or into the groin; she had constant flatulence, weight, and oppression after food; was pale, flabby, and emaciated, but had no emotional or nervous symptoms except an annoying amount of insomnia. The lower border of the stomach was fully two inches below the navel in the middle-line, even when only a glass of water had been taken. It was a little lower after a small meal. The colon was distended and very variable in position, probably changing its relations with the landmarks as it happened to be more or less filled with food or gases. The abdominal walls were flabby, relaxed, and pendulous, and the whole surface tender. The patient gave a history of sudden loss of flesh with almost no reason some three years before, and increasing indigestion in all forms ever since. The tenderness made careful abdominal study difficult, but lessened enough after a few days in bed to permit the perception of a displacement of the right kidney, whose lower edge could be felt on a level with the umbilicus and two inches to the right of it. No change of position would bring it any lower. Examined with the patient prone, two-thirds of the kidney could be outlined, extremely tender, and causing nausea and sinking if pressed upon. The chief trouble in treatment proved to be the irritability of the intestines, which was brought on in most unexpected fashion by foods of the simplest kind. For some time it was so persistent that the suspicion of intestinal tuberculosis was entertained; but it finally disappeared, and after that the case progressed more favorably and she was out of bed with a tight belt and kidney-pad in a little more than twelve weeks. The kidney was then, and has remained since, in its normal position. The patient gained twelve pounds in weight, and should have gained more, but she found the hot weather during the latter weeks of her treatment very trying. The intestinal indigestion was only partially relieved, but the gastric symptoms, the general pains, and weakness all disappeared, and with precaution she will continue to improve. It is best to advise the constant use of the belt in such a case. In a patient who has made a large gain in flesh, as this one did not, and who has been found after some months to maintain the increased weight, the belt might gradually and experimentally be left off; but repeated examinations should be made for a year or two to be sure that no displacement results.