Medical Corps, U. S. Navy, U. S. Naval Medical Center, Washington, D. C.

* Read during the Twenty-Seventh Annnual Forum of Anesthetists, the Associated Anesthetists of the U. S. A. and Canada in Joint Meeting with the Mid-Western Association of Anesthetists, Southern Association of Anesthetists, St. Louis Society of Anesthetists and St. Louis Dental Society. American Medical Association Week, the Coronado Hotel, St. Louis, Mo., May 15–19, 1939. The contents of this paper should not be construed as an official statement of the Navy Department.