Having all arrived at this conclusion, independently of each other, it was agreed that as there was some obscurity in the case, and also that in the event of there being a fœtus outside of the uterus it had now advanced to about the fourth month of gestation; consequently the most favorable time for the employment of the electric current had passed. In view of these facts, and also of the fact that exploratory incisions are attended with comparatively little danger, it was decided to make an exploratory incision and determine what was the condition of things. If a fœtus was found remove it if possible. If the trouble was something that could not be removed, the incision could be closed and the patient probably in no wise injured. Dr. Allen was asked to operate, and on the sixth of August the operation was performed. There were present, Dr. Allen, Dr. Scott, Dr. Millikin and the house staff. The anæsthetic was administered, and before commencing the operation an aspirator needle of good size was introduced into the tumor through the vagina. Upon exhausting the air no fluid was obtained, but upon partially withdrawing the needle about a drachm of clear serum was obtained, which was thought to be peritoneal fluid. It was then decided to proceed with the operation. An incision was made about an inch above and parallel to Poupart's ligament, commencing at the anterior superior spinous process of the ilium, and terminating at the outer margin of the rectus muscle. On opening the abdomen an adherent mass was found closely attached to the coecum. Strong bands also passed from the mass toward the symphysis pubis. In order to reach the mass more fully, and also the annexes of the uterus, the adhesions to the pubis were divided between ligatures. This having been done, it was still found to be impossible to detach the intestines which were closely adherent to the coecum, and nothing abnormal could be found in connection with the uterus. Failing to discover the cause of the adhesions about the coecum from the abdominal cavity, it was thought this might be accomplished by separating the peritoneum from the iliac fossa, and reaching the coecum from the outer and posterior side. This separation was continued until it could be carried no further without great danger of wounding the external iliac vessels, which were exposed for several inches. Although nothing further than a closely adherent mass of intestines had been found, an attempt to separate which had been carried to the limit of safety, and the cause of the malady had not been demonstrated with entire satisfaction, it was deemed best to close the abdominal incision, which was accordingly done.