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In the ordinary routine observation of the corset of a patient suffering from pelvic or abdominal disorder, the time required is five minutes, and the outlay a few cents. Two clips to hold a

FIG. 31.—Pressure measurements. An aneroid (sphygmomanometer) hanging on the wall, is connected by tubing with a bag that is slipped under the corset.

sheet of wrapping paper against a wall, and a mark on the floor, suffice. Manila paper in rolls runs 2 feet wide. To a moderately smooth blank surface of wall, fairly lighted, at about 5 feet 4 inches from the floor, the clips are fastened. Any small clip