Public [act] 170-250, 73d Congress. Chicago, A Century of Progress. S. 3235, act to amend act providing for participation of United States in A Century of Progress (Chicago World's Fair Centennial Celebration) to be held in Chicago, Ill., in 1933, authorizing appropriation therefor, and for other purposes, approved Feb. 8, 1932, to provide for participation in A Century of Progress in 1934, to authorize appropriation therefor, and for other purposes.