This end is drawn back through the vagina like the first, and is tied around the other so as to form a running noose. The rope is now drawn through the ring until it forms a tight loop, encircling the belly just in front of the hind limbs. On this strong traction can be made without interfering with the full flexion of the limbs on the body, and if the case is a suitable one, and the body of the fetus and the passages are both well lubricated with oil or lard, a successful parturition may be accomplished. A less desirable method is to put a rope around one thigh or a rope around each and drag upon these, but manifestly the strain is not so directly on the spine, and the limbs may be somewhat hampered in flexion. This method being inapplicable, the next resort is to cut off one or both hind limbs at the hip joint. Free incisions are made on the side of the haunch so as to expose the hip joint, and the muscles are cut away from the head of the thigh bone down to its narrow neck, around which a rope is passed and firmly fixed with a running noose. The joint is now cut into all around, and while traction is made on the cord the knife is inserted into the inner side of the joint and the round ligament severed. The cord may now be dragged upon forcibly, and the muscles and other parts cut through as they are drawn tense, until finally the whole member has been extracted. Traction on the rope round the other thigh will now suffice to extract, in most cases, but if it should fail the other limb may be cut off in the same manner, and then hooks inserted in front of the brim of the pelvis or in the openings in the bones of its floor (obturator foramina) will give sufficient purchase for extraction. Another method is to insert a knife between the bone of the rump (sacrum) and the hip bone and sever their connections; then cut through the joint (symphysis) between the two hip bones in the median line of the floor of the pelvis, and then with a hook in the opening on the pelvic bones (obturator foramen) drag upon the limb and cut the tense soft parts until the limb is freed and extracted. _Presentation of the back._--In this presentation straining may be active, but after the rupture of the water bags no progress is made, and the hand introduced will recognize the back with its row of spinous processes and the springing ribs at each side pressed against the entrance to the pelvis. (Pl. XVII, fig. 6.) The presence or absence of the ribs will show whether it is the region of the chest or the loins. By feeling along the line of spines until the ribs are met with we shall learn that the head lies in that direction. If, on the contrary, we follow the ribs until they disappear, and a blank space is succeeded by hip bones, it shows that we are approaching the tail. The head may be turned upward, downward, to the right side, or to the left.