Clarence T. (Tom) Day, 70, a former superintendent of the House of Representatives Periodical Press Gallery, died at the Veterans Administration Hospital in Washington Saturday following a heart attack.

Mr. Day was born in De Valls Bluff, Ark., and came to Washington in 1929 as a member of the 101 Wild West Ranch Circus. When the circus went broke here, Mr. Day got a job as a clerk at the Treasury Department.

He later went to work in the Capitol as an elevator operator. He worked in the Capitol post office and was a Capitol policeman before being assigned to the House Radio and Television Correspondents' Gallery in 1947. In 1955, he was named superintendent of the House Periodical Press Gallery and held that position until he retired in 1972.

Mr. Day served in the Army during World War II.

He and his wife, Celeste, lived in Arlington for many years. They later lived in Annandale and then moved to Springfield, Va., several months ago.

Mr. Day was a 32nd degree Mason.

Survivors include his wife, of the home in Springfield; three daughters, Peggy Harris, of Dumphries, Va., Carolyn Clark, of Leesburg, Va., and Cheryl Sullivan, also of Springfield; three brothers, Carl, of Arlington, and George and John, both of De Valls Bluff; three sisters, Lucille Tyson, of Atkin, Ark., Elsie Gains, of Texas, and Martha Trusler, of Memphis, Tenn., and five grandchildren.