TIME Cover: Andrew Wyeth's World

* Others that have temperas: Milwaukee Art Center; Wilmington (Del.) Society of the Fine Arts; Addison Gallery of American Art in Andover, Mass.; Toledo Museum of Art; Philadelphia Museum of Art; Pennsylvania Academy of the Fine Arts in Philadelphia; William A. Farnsworth Library and Art Museum in Rockland, Me.; Shelburne (Vt.) Museum; New Britain (Conn.) Museum of American Art; Wadsworth Atheneum in Hartford, Conn.; and Currier Gallery of Art in Manchester, N.H. * Drybrush, used by Wyeth's mentor of the miniature, Albrecht Dürer, as early as 1450, is more like drawing than watercoloring in technique. The artist works over still wet washes of water-soluble pigment with a brush dipped in concentrated color and squeezed almost dry. The stiff bristles, flattened and frayed looking, add textures of weight and depth. "I use it for the grass on a hill, for example, or the bark of a tree," says Wyeth. * The National Gallery of Norway in Oslo has the 1959 tempera, Albert's Son, by donation from former U.S. Ambassador to Norway L. Corrin Strong.