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Oscar Bluemner (1867-1938), Approaching Black, 1932; Casein-oil-resin emulsion and watercolor on paper mounted to millboard, 31 5/8 x 40 x 2 1/4 inches; Courtesy of Karen and Kevin Kennedy

Oscar Bluemner (1867-1938), Approaching Black, 1932; Casein-oil-resin emulsion and watercolor on paper mounted to millboard, 31 5/8 x 40 x 2 1/4 inches; Courtesy of Karen and Kevin Kennedy