After the birth of the child, and the tying of the naval string, it is proper to apply the hand upon the abdomen of the mother to ascertain whether there be another child, and whether the uterus be contracting properly. I advise that an effort should be made immediately to remove the afterbirth and secundines, making firm pressure over the womb; this will generally stimulate the uterus to make good contractions, and may assist in pressing out the placenta. I do not advise that a midwife should pull upon the cord, but it is my practice to press the fingers of my right hand well into the vagina, and as soon as possible grasp a little of the placenta; my left hand at the same time pulling slightly on the cord, and thus by combined effort removing the afterbirth pretty quickly. I have never had much trouble about retained or adherent placenta in cases where I myself officiated in the delivery, and I attribute my good fortune in this respect to the fact that I do not tie the placental portion of the cord, preferring to let some blood discharge from the afterbirth, thus diminishing its size, and then if necessary I direct that considerable effort be made in the way of squeezing and pressure and friction over the uterus. It is true that if nothing is done a pain will usually come on within twenty minutes that will expel the afterbirth very effectually including all the membranes, and considerable clots of blood; but I apprehend that in many cases during this delay there is an hour-glass contraction of the womb comes on, which retains the placenta and prevents its proper separation. But before attending to the placenta, the necessary attention should be paid to the child. A little cold water sprinkled on it will usually make the child cry, if it does not breath immediately after it is born, and this makes the change in it from uterine to breathing life. The child may then be separated from the mother by cutting the cord. After the removal of the child it is proper to endeavor to deliver the afterbirth, though it may not be necessary at first to do anything more than to use friction over the uterus with moderate pressure, which may be gradually increased. CHAPTER IV. MECHANICAL PHENOMENA OF LABOR. The cavity of the uterus and that of the pelvis form a continuous PASSAGE through which the child must be forced in its exit from the womb at birth. The uterus possesses the character of muscularity and is the main agent in the expulsion of the child. By its own muscular action the cavity of the uterus is diminished and pressure made on the fœtus, forcing it down towards the orifice, distending the cervix, and dilating the passage. During the second stage of labor the power of the uterus is aided by the voluntary muscles of the abdomen and by the depression of the diaphragm.