selling air

http://hyperallergic.com/220396/from-duchamp-to-hipsters-the-art-of-selling-air/?utm_medium=email&utm_campaign=The+Little-Known+Engineer+Who+Made+the+First+Abstract+Paintings+in+the+US&utm_content=The+Little-Known+Engineer+Who+Made+the+First+Abstract+Paintings+in+the+US+CID_a1667193e16b3b342fd455f2539cc96b&utm_source=HyperallergicNewsletter&utm_term=From%20Duchamp%20to%20Hipsters%20the%20Art%20of%20Selling%20Air