It was supposed until quite recently that when the body of the womb was inclined horizontally forwards, this was unnatural or a sign of disease, until Prof. B. S. Schultze, director of the gynecological clinic of Jana, successfully controverted this doctrine. In his work “_Die Pathologie und Therapie der Lageverænderungen der Gebærmutter_,” which is the most classical work extant on displacements of the uterus, says: “From the _post-mortem_ findings it was inferred that the uterus occupied in the _living_ woman the same position as in the cadaver; such an assumption did not take into account the actions of the muscles on the position of the uterus in the living subject nor the intra-abdominal pressure which is entirely absent after death, so that the dead organ naturally gravitated backward after the remains had lain for several days on the back.” Another observer, Dr. Hach, found in a number of cases that he had examined during life, the uteri bent forward or antiflexed; twenty-four hours after death he discovered the same uteri in an opposite direction or retroflexed. This and similar subsequent researches have demonstrated the fact that when the body of the womb rests on the bladder it is not in an abnormal position as formerly supposed and called _anteversion_ or anteflexion, but that it is natural for it to be so, and when the body is elevated and its axis forms an obtuse angle with the horizon, the inclination is a _post-mortem_ condition. With these precursory remarks I am now able to answer the first clause of our query, and would say that the uterus is in its normal position when its long axis is nearly parallel to the horizon or at right angles with the perpendicular or long axis of the body. The normal position of the uterus is modified when the bladder is full or distended, for this lifts the body of the uterus upwards, thus temporarily making an acute angle with the vertical axis of the body, which was formerly considered to be the permanent and natural pose of the organ. In referring to the bony pelvis, Plate I, it will be observed that the same is in the nature of a canal, for the passage of the child into the world. At other times than during the child-bearing process, this canal must be effectually closed to perfectly retain its contents. To accomplish this purpose it is provided with a bottom or floor, which is to give this necessary support, not only to the organs that the pelvic cavity contains but also to the abdominal viscera that are superimposed upon them. In order to accomplish this, its outlet must be as effectually closed as the bottom of a box or barrel in which material things are stored for the purpose of carrying them from place to place. In the human subject this bottom is called the pelvic floor, because it serves the purpose of a bottom or floor to the pelvic canal.