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 specific gravity between mercury and water is 13.6. Thus, lying down with clothing loose, the equivalent in the rectum with the mercury manometer would be about 8 millimeters, when our subtraction for bag tension has been made, and in the standing posture 30 mm. Hg., corrected. Lying down, the vaginal pres­sures run higher than this in muscular women.



These studies, extending over several years, were made in office practice among women for the most part in comfortable circumstances. They covered somewhat less than a hundred individuals., traced in outline, tested for pressures, measured