Equivalent, from Set A (Third Set, Print 7) 1929

Alfred Stieglitz's "Equivalent, from Set A (Third Set, Print 7)" (1929) is a photogravure print of a cloudy sky. Stieglitz is known for his "Equivalents," a series of photographs that aimed to capture the feeling and essence of his emotions and not just the literal subject matter. The swirling and dynamic composition of the clouds in "Equivalent" evokes a sense of movement, energy, and abstract beauty. The piece is housed in the Art Institute of Chicago.