By Charles Stuckey. In the late 1940s, Abstract Expressionist painter JacksonÂ PollockÂ began experimenting with a new method of working that involved dripping, flinging, and pouring paint onto Masonite panels and unstretched canvases laid flat on the floor. This process engaged his entire body, and the resulting paintings are a direct index of the antic dancing energy he expended to create them.Â One: Number 31, 1950, among the handful of very large paintingsÂ Pollock produced by this method, is a virtuoso showcase of his mastery of materials and technique. Former museum curator Charles Stuckey offers an in-depth exploration ofÂ PollockÂ and this majestic painting, one of many groundbreaking works by the artist in MoMA's collection. 48 pp.; 35 color ills.