DIED. JOHN LUDLOW GOULD, 79, TV critic; in Concord, California. Writing as "Jack" for the New York Times, Gould became known during the first decades of television as one of its most relentless critics and analyzers, acquiring a reputation as "the conscience of the industry." Among his more prominent pieces were stories on the late-'50s quiz-show scandals and his scathing assault on the networks in 1956 for running game shows instead of broadcasting the live U.N. Security Council proceedings on the Suez crisis.