Readymades of Marcel Duchamp to turn up any identical matches to photographs of the originals. However, there are accounts of Walter Arensberg and Joseph Stella being with Duchamp when he purchased the original "Fountain" at J. L. Mott Iron Works. Such investigations are hampered by the fact that few of the original "readymades" survive, having been lost or destroyed. Those that still exist are predominantly reproductions authorized or designed by Duchamp in the final two decades of his life. Shearer also asserts that the artwork "L.H.O.O.Q." which is recorded to be a poster-copy of the "Mona Lisa" with a moustache drawn on it, is
Marcel Duchamp financial disaster, but some optical scientists thought they might be of use in restoring three-dimensional stereoscopic sight to people who have lost vision in one eye. In collaboration with Man Ray and Marc Allégret, Duchamp filmed early versions of the "Rotoreliefs" and they named the film, "Anémic Cinéma" (1926). Later, in Alexander Calder's studio in 1931, while looking at the sculptor's kinetic works, Duchamp suggested that these should be called "mobiles". Calder agreed to use this novel term in his upcoming show. To this day, sculptures of this type are called "mobiles". Between 1912 and 1915, Duchamp worked with various