Trees (from series, the Mathematical Basis of the Arts)1934 · tempera and pencil on paperboard11 1/2 x 7 3/4 in. (29.2 x 19.7 cm)Smithsonian American Art Museum
Green Squares (from series, the Mathematical Basis of the Arts)1934 · tempera on paperboard11 7/8 x 11 1/4 in. (30.1 x 28.7 cm)Smithsonian American Art Museum
Key Blue (from series, the Mathematical Basis of the Arts)1934 · tempera on paper12 x 9 in. (30.5 x 22.9 cm)Smithsonian American Art Museum
Area Broken by Perpendiculars1934 · opaque watercolor9 x 12 in. (22.9 x 30.5 cm)Smithsonian American Art Museum
Study in Rhythm: Red and Gold1934 · gouache on paperboardsheet: 14 1/2 x 19 1/4 in. (36.8 x 48.9 cm)Smithsonian American Art Museum
Blue Gray Violet Wheel (from series, the Mathematical Basis of the Arts)1934 · tempera on paper14 x 10 1/2 in. (35.6 x 26.7 cm)Smithsonian American Art Museum