Fig. 1 Arthur Dove, Moth Dance, 1929, oil on canvas, National Gallery of Art, Washington, Alfred Stieglitz Collection
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Fig. 2 Marsden Hartley, The Aero, c. 1914, oil on canvas, National Gallery of Art, Washington, Andrew W. Mellon Fund
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Fig. 3 John Marin, The Written Sea, 1952, oil on canvas, National Gallery of Art, Washington, Gift of Deborah and Ed Shein
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Fig. 4 Edward Steichen, Le Tournesol (The Sunflower), c. 1920, tempera and oil on canvas, National Gallery of Art, Washington, Gift of the Collectors Committee
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Fig. 5 Charles Sheeler, Classic Landscape, 1931, oil on canvas, National Gallery of Art, Washington, Collection of Barney A. Ebsworth
