6. This method ("sunrise slumber") is certainly far more safe in ordinary and unskilled hands than the "twilight sleep" procedure. The patient is more safe with this method in the hands of the average doctor or trained nurse. 7. It has been our experience that nitrous oxid in the smaller, interrupted and analgesic doses, actually tends to stimulate the uterine pains and contractions, while at the same time rendering the patient quite oblivious to their presence. When properly administered, the freedom from pain is perfect. 8. Under the influence of "gas," patients often appear to "bear down" with increased energy. It certainly does not lessen their cooperation in this respect. 9. We have not observed, nor have we learned of, any cases of inertia (weak and delayed contractions), post partum hemorrhage, or shock, as a result of "laughing gas" or "sunrise slumber" analgesia. 10. This method lends itself to perfect control--it may be decreased, increased, or discontinued, at will; it may be given light now and heavy at another time; while, at the height of labor, it may be pushed to the point of complete anesthesia, if desired. 11. We have found "sunrise slumber" (nitrous oxid) analgesia to be the ideal obstetric anaesthetic, and have adopted it quite to the exclusion of both chloroform and "twilight sleep." We find that this form of analgesia has all the advantages of "twilight sleep" without any of its dangers or disadvantages. 12. A possible objection to the nitrous-oxid method is the cost, especially in the private home. The average cost in the hospitals where we are using this method runs about $2.00 for the first hour and $1.50 for each hour thereafter. This is the cost when using large tanks of gas, and is, of course, somewhat increased when the smaller tanks are used in the patient's home. METHOD OF ADMINISTRATION Since it was thought best to give the reader some idea of the technic for the administration of "twilight sleep," it may not be amiss to explain how "sunrise slumber" is usually employed in labor cases. The technic is very simple. The administration of the gas is generally begun about the time the patient begins seriously to complain of the severity of the second stage pains; although, of course, the gas can be given during the first stage pains if desired. In the vast majority of cases, however, we think it is best to encourage the patient to endure these earlier and lighter pains without resorting to analgesic procedures.