Cornelius M. Reing, 74, a retired Army colonel and high school history and political science instructor who had lived in Arlington since 1959, died of cancer Tuesday at Arlington Hospital.

Col. Reing was a native of Mahanoy City, Pa., and a 1923 graduate of Catholic University. He worked for a bank in New York before entering the Army in 1941.

During World War II, he was stationed in this country with the Quartermaster Corps. After the war, he served in Japan and Germany. He was assigned to the Office of the Inspector General of the Quartermaster Corps in Washington when he retired from active duty in 1961.

From about 1963 to 1973, he taught history and political science at Archbishop John Carroll High School in Washington. He then retired a second time.

Col. Reing was a member of the parish of St. James Catholic Church and the Edward Douglas White Council of the Knights of Columbus. He also was a member of the Retired Officers Association.

Survivors include his wife, Frances L., of Arlington; two sons, Dr. C. Michael, of Fairfax, and John F., of Toledo, Ohio; a daughter, Patricia Reing Davenport of Arlington; a sister, Catherine Reing Hall of Ocean City, N.J., and seven grandchildren.