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Rotary Demisphere (Precision Optics) | musefully
Duchamp, Marcel. Rotary Demisphere (Precision Optics), Paris, 1925. Painted papier-mâché demisphere fitted on velvet-covered disk, copper collar with plexiglass dome, motor, pulley, and metal stand, 58 1/2 x 25 1/4 x 24" (148.6 x 64.2 x 60.9 cm). Gift of Mrs. William Sisler and Edward James Fund, 391.1970.a-c. (Photo: MoMA)