Dr. Emily Mae Horrington, 61, a former research scientist and college professor who had been a biology teacher at Ballou Senior High School since 1976, died Aug. 22 at a hospital in New York City where she was being treated for cancer. She lived in Silver Spring.

She came to Washington in 1975, and spent a year on the faculty of the old Federal City College before joining Ballou. Before coming to Washington, she had taught for four years at Livingstone College in North Carolina.

Dr. Horrington was a native of Statesville, N.C. She earned bachelor's and master's degrees at North Carolina Central University and a doctorate in animal nutrition at Cornell University.

Over the years, she had taught at a number of colleges, including Storer College in West Virginia, Paine College in Georgia, and Elizabeth City State University in North Carolina. Between 1961 and 1971, she had been a research scientist and research director. Her places of employment had included a subsidiary of the Booz, Allen and Hamilton research organization, and the Public Health Research Institute of the City of New York.

She was the recipient of a 1959 Ciba (pharmaceutical company) Award for her work in research on aging, and was the author of numerous technical works. She was a fellow of the American Association for the Advancement of Science, a charter member of the American Aging Association, and a member of the American Association of Laboratory Scientists and the Organization of Black Scientists. She also was a member of Christ Episcopal Church in Kensington.

Survivors include a brother, Ira Horrington of Lynwood, Calif., and a sister, Myrtle B. Horrington of Brooklyn, N.Y.