Benjamin F. Emenheiser, who taught history at City College for 44 years, died Wednesday at Union Memorial Hospital from complications of diabetes. He was 93.

Mr. Emenheiser was a native of Annville, Pa., and a 1921 graduate of Lebanon Valley College. He taught for a year in Freeland, Pa., before moving to Baltimore and joining the faculty of City College, where he taught until retirement in 1966.

He led the history department at City College and, for 4 1/2 years, at the old Baltimore Junior College, originally housed in the same building at 33rd Street and The Alameda.

Mr. Emenheiser coached City's tennis team for nine years. He also was a class adviser and adviser to the school's chapter of the National Honor Society.

In 1961, Mr. Emenheiser was a guest on the television program, "I've Got a Secret." The host was Baltimore native Garry Moore. Mr. Emenheiser's secret -- which a celebrity panel had to guess -- was that he had flunked Mr. Moore in history.

In 1969, Mr. Emenheiser was inducted into the City College Hall of Fame -- where Mr. Moore also is enshrined.

Mr. Emenheiser also was noted for his voice, and he sang over the years at several Baltimore churches. He was a member of St. Thomas' Church in Garrison and the Churchman's Club of Maryland. He lived in Roland Park for most of his adult life.

His wife of 45 years, the former Roberta Glanville, who taught musicat Harrison Forest School, died in 1973.

Mr. Emenheiser is survived by two brothers, William Emenheiser of Tallahassee, Fla., and Kephart Emenheiser of Tampa, Fla.; and nieces and nephews.

Services were private.