Should the surgeon attempt injection along the canal and find the patient too nervous or the technic too difficult the hypodermic may be used and an injection made through the anterior wall of the canal at the internal ring, at about the center of the canal and about one-half an inch from the external ring. The hypodermic needle injections are simple and should be accomplished even on a very nervous patient without troubling to infiltrate with cocain or alypin. BE DISCREET IF INJECTION IS PAINFUL. Should a patient complain that the injection is painful inject very discreetly or better check the injection there, move the point of the needle and again try slowly. If the cold injection causes pain try at another point. Put in a drop or two and should the patient still complain discontinue and put on a spica or truss for a few days. Observe the reaction and then if it is not severe inject again. Remember that several injections may be made upon a patient but hyperinjection, that is the injection of too much, will cause no little distress and that it is impossible to remove all the paraffin mixture or the vaseline without an open operation, if they are not absorbed. Needle punctures should be sealed with collodion. No other dressings are required. Begin codeine early and use freely when a painful reaction develops. THE INJECTION OF FEMORAL HERNIA. The femoral ring is below Poupart's ligament. When the femoral hernia protrudes through the crural canal it is directed upward over Poupart's ligament. To reduce it press the mass toward the feet of the patient and then upward toward the abdominal cavity. The saphenous opening may then be felt. On the outer side of the opening is the large vein of the thigh. The needle should be inserted at the inner extremity of the opening, that is toward the median line. Aspirating of blood may mean the puncture of this large vein and it may not be advisable to inject carelessly when this vein has been wounded owing to its size. The crural canal is only about a half inch in length. The injection of it may be accomplished with a hypodermic needle. It is not well to sweep the point of the needle externally with too great freedom as the vein may be wounded. Inject slowly and move the point of the syringe carefully so that the injection may be diffused in the canal. INJECTION OF UMBILICAL HERNIA. Reduce the hernia and examine the margins of the hernial ring with care so as to be thoroughly acquainted with the character and situation of these margins. Remember that the tissues are often very thin and that an injection in the center of the hernia may simply go through the peritoneum and thus be placed directly in the abdomen. Injections of paraffin into the peritoneal cavity of animals have not proven to be dangerous, the agent not causing irritation of the surface of the peritoneum when sterile.