Harpo Marx painted "his" portrait. In 1955, Harpo made an appearance on the sitcom "I Love Lucy," in which he and Lucille Ball re-enacted the famous mirror scene from the Marx Brothers movie "Duck Soup" (1933). In this scene, they are both supposed to be Harpo, not Groucho; he stays the same and she is dressed as him. About this time, he also appeared on NBC's "The Martha Raye Show". Harpo recorded an album of harp music for RCA Victor ("Harp by Harpo", 1952) and two for Mercury Records ("Harpo in Hi-Fi", 1957; "Harpo at Work", 1958). Harpo and Chico played a
Karl Marx and the Close of His System has been seen as one of the most important discussions of Marx's economic theories, along with Rudolf Hilferding's "Böhm-Bawerk's Criticism of Marx", a defense of Marx against Bawerk. Bawerk's work is the "classical" critique of "Capital". Most subsequent critiques of Marxist economics have repeated Bawerk's arguments. Marxist economist Ernest Mandel identifies "Karl Marx and the Close of His System" as part of a literature, beginning with German social democrat Eduard Bernstein, that criticizes the dialectical method Marx borrowed from Georg Wilhelm Friedrich Hegel as "useless", "metaphysical", or "mystifying." He faults Böhm-Bawerk and the other critics for what he regards as