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 labour value, he argues that the basic error in Marx's system resulted from a self-contradiction of Marx's law of value, namely how the rate of profit and the prices of production of the third volume of Marx's "Capital" contradict Marx's theory of value in the first volume. He maintains that since the law of value is not directly controlling in capitalist production, the theory of value must be abandoned. Bawerk also attacks Marx for downplaying the influence of supply and demand in determining permanent price, and for deliberate ambiguity with such concepts. "Karl Marx and the Close of His System"