Palpation for the purpose of finding the tumor, if it be not at once evident, or for examining it after it is found, should be bimanual, one hand being placed in the space between the ribs and the crest of the ilium of the supine patient and pressed strongly upward, while the surface rather than the points of the fingers of the other hand should be carried and pressed with some firmness into the relaxed abdominal parietes. In this way the kidney may be caught between the two hands and examined more or less completely according to the thickness of the abdominal walls. Sometimes the kidney can be partly grasped between the {25} finger and thumb of one hand. In this way the size, shape, and sensitiveness of the tumor can be determined, as well as its position and movability. A movable kidney may of course present some difficulties of diagnosis from other abdominal tumors. The liver is sometimes, though very rarely, movable, and never to the same extent as a wandering kidney, and as it is pushed downward discloses its much greater bulk. The base of the gall-bladder may occasionally be quite movable, but its excursions are of a more limited radius, being of course executed only by the base and not the whole organ. The spleen, when it descends so as to be distinctly felt below the ribs, is much less movable, and if it descends deeply without great enlargement, its absence from its proper place is demonstrable by percussion. The splenic tumor is also larger, firmer, and more closely applied to the abdominal walls than the floating kidney. The left kidney, it should be remembered, is less frequently movable than the right. A small ovarian tumor might be mistaken for a movable kidney low down in the abdomen, or vice versâ. The latter error has actually been committed, and has led to an attempted removal of the supposed cyst. The more easy movability of the kidney upward and of the ovary downward or laterally, as well as the shape, and in many cases the result of a vaginal examination, should be sufficient to make the distinction, which, if an exact diagnosis be absolutely necessary, may be confirmed by aspiratory puncture. A malignant omental tumor might at the first examination present points of difficulty in diagnosis, but even if it were single and counterfeited with considerable accuracy the shape of the kidney, neither of these conditions would be likely to continue for any length of time. TREATMENT.--The treatment usually suggested for this affection is based partly on the fact that many cases are hysterical, and also on that other more important one, that very little can be done to restrain the vagaries of the offending organ. A correct diagnosis, it has been frequently remarked, is often sufficient to relieve the patient's mind, and secondarily her body, and may be all that is necessary in cases where the symptoms are all psychical and have arisen from the discovery of a tumor of unknown nature.