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 records are made as a sign that the bag and tubing are freely communicating.

Intrapelvic Pressures.—It has been established that the average pressure at any spot in the pelvis (or abdomen) is repre­sented by a column of water standing on the level of such spot, FIGS. 10.—Corset deformities A. Trunk atrophy. Falguièrés statue made from Claude de Merode compared with the Venus of the Vatican, FIG. 10a.

whose height is the distance to the top of the abdominal cavity. For instance, in the rectum the pressure is 40 cm. of water in the standing position. This is the distance to the vault of the diaphragm. Lying down the pressure is 10 cm. of water or the distance to the anterior abdominal wall. The difference in