is an unseen object (a sewing machine) wrapped in cloth and tied with cord. Another work from this period, Aerograph (1919), was done with airbrush on glass.
In 1920 Ray helped Duchamp make his first machine and one of the earliest examples of kinetic art, the "Rotary Glass Plates" composed of glass plates turned by a motor. That same year Man Ray, Katherine Dreier and Duchamp founded the Société Anonyme, an itinerant collection which in effect was the first museum of modern art in the U.S.
Man Ray - The Enigma of Isidore Ducasse