No man in the United States has had more to do with public works than ROBERT MOSES. He has been head of the state park system of New York since 1924, park commissioner of New York City and chairman of the Triborough Bridge Authority since 1934. He was Secretary of State under Governor Smith. He is a member of the City Planning Commission. His guiding spirit has trebled the recreation facilities of his state and city, brought into being the great metropolitan parkways and bridges, Jones Beach, and play areas from Niagara Falls to Montauk Point. At the Atlantic's request he speaks his mind on that stubborn problem of slum clearance.