EditorialThe Rhine at Duisburg, 1937, Gypsum, oil, and charcoal on cardboard, 7 1/2 ? 11 in. (19.1 ? 27.9 cm), Paintings, Paul Klee (German (born Switzerland), M?nchenbuchsee 1879?1940 Muralto-Locarno), Here, Klee inventively transforms the industrial city of D...