From the Department of Surgery, Division of Urology, University of Michigan, Ann Arbor, Mich.
*Present address: Department of Urology, Wayne State University Medical School, Detroit, Mich
Accepted March 20, 1958.
Note by editor. Doctor Pierce’s manuscript was awarded a prize in the essay competition sponsored annually by the American Urological Association, Inc., under the supervision of the Committee on Scientific Research, Dr. Miley B. Wesson, chairman.
