 From that period he created "Die Zwitscher-Maschine" (The Twittering Machine), which was later removed from the National Gallery.After being named defamatory in the Munich exhibition "Entartete Kunst", the painting was later bought by the Buchholz Gallery, New York, and then transferred in 1939 to the Museum of Modern Art.The "twittering" in the title refers to the open-beaked birds, while the "machine" is illustrated by the crank.