roll out the engine by the power and methods prepared to run out finished work. First you see a door open because the lock is taken off by a key that opens all mysteries; and the great ropes that have been far inferior to the force of resistance, that has held the door shut, are all sufficient in power. By getting sick, muscles become convulsed to rigidity of great strength with force enough to push the new engine of life out into open space easily, by nature's team that never fails to obey orders to deliver all goods intrusted to its care. PREPARATION FOR DELIVERY. A student of mid-wifery can only learn a few general principles, before he gets into the field of experience. Actual contact with labor teaches him that much that he has read and had told to him by professors of mid-wifery in the lectures, is of but little use to him at the bedside. What he needs to know is, what he will have to do after he gets there. He must know the form and size of the bones of a woman, how large a hole the three bones of the pelvis make, for the reason that the child's head will soon come through that hole. He must know a normal head cannot come through a pelvis that has been crushed in so much as to bring the pubis within one and one-half to two and one-half inches of the sacrum. He must examine and know, and do this soon after he is called, for the reason, that he will have to use instruments in such deformities, and may wish the counsel of an older and more experienced doctor. And this precaution will give him time to be ready for any emergency. But more than ninety per cent of all cases are of a very simple nature. The mother is warned by pains in back and womb, coming and repeating at intervals of one-half hour to less time. When by the finger the doctor can tell the mouth of the womb has opened to the size of a quarter or half dollar, he then may know that labor will soon start in good earnest, and at this time it is well to call for a twine, cut two strings about a foot long, to tie around the navel cord. CAUTION. The first duty of the obstetrician is to carefully examine the bones of the pelvis and spine of the mother, to ascertain if they are normal in shape and position. If there is any doubt about the spine and pelvis being in good condition for the passage of the head, through the bones, and you find pelvic deformity enough to prohibit the passage of the head, notify the parties of the danger in the case at once, and that you do not wish to take the responsibility alone, as it may require instruments to deliver the child, as there is danger of death to the child and mother also, but less danger to the mother than to the child. Now you have done that which is a safeguard against all trouble following criminal ignorance.