This three-dimensional work consists of approximately thirty white discs of graduated size attached to metal wires of various weights and lengths. This type of suspended sculpture is known as a "mobile," the term that Marcel Duchamp suggested for Alexander Calder's unique form of sculpture that moved in response to natural forces. Fourth Flurry '48 sways and shifts in response to air currents and the counterbalances of gravity, creating a constantly changing, asymmetrical yet balanced composition. Looking up at the slowly moving sculpture, the viewer is presented with a sensation evocative of a wide variety of natural forms and systems in motion, from snowflakes to solar systems, from atoms to galaxies. At the same time, this airy graceful sculpture functions on purely abstract terms. The white circular shapes, which create a rhythm through their repetition, are juxtaposed with the black-painted wire lines, creating a whimsical, abstract drawing in space.