POTTER, Hazard Arnold, surgeon, born in Potter township, Ontario (now Yates) County, New York, 21 December, 1810; died in Geneva, New York, 2 December, 1869. He was graduated at the medical department of Bowdoin in 1835, and began the practice of his profession in Rhode Island, but soon returned to his native town. In 1835 he settled in Geneva, where he performed successfully many critical surgical operations, and in 1837 he called attention to the presence of arterial blood in the veins of parts that had been paralyzed in consequence of injury to the spinal cord. He trephined the spine for depressed fracture of the arches of the fifth and sixth vertebrae in 1844, and subsequently he performed the same operation four times, twice successfully. Later he performed ligature of the carotid artery five times, four times successfully, and removed the upper jaw six times and the lower five times. Dr. Potter was early convinced of the safety of operations within the abdominal cavity, and in 1843 performed gastrotomy for the relief of intussusception of the bowels with perfect success. He removed fibrous tumors of the uterus from within the abdominal cavity five times, in three cases successfully. He extirpated by ovariotomy twenty-two ovarian tumors, fourteen of them successfully, and in one of the successful cases both ovaries were removed at the same time. In another case, also successful, the operation was repeated upon the same patient twice with an interval of seventeen months. Dr. Potter served as regimental surgeon of the 50th New York engineers in 1862.