—Mrs. E. A., aged 25, born in Indiana of French and German descent, was admitted to the obstetric service of the City Hospital, Aug. 10, 1920, because of a severe pain in the abdomen. Although of slender build and not very robust, her health had always been moderately good. She had begun to menstruate when 14 years old; and, until her present pregnancy, menstruation had always been regular and normal. She had never suffered from leukorrhea nor had a miscarriage. She was...