AN EXHIBITION of more than 120 spectacular artifacts from the regions where the Silk Road wound through Chinese territory is on view at the Norton Museum of Art, West Palm Beach, Fla. Included are metalwork, textiles, glass, funerary furniture, ceramics, and Buddhist sculptures, many only recently excavated and most never before exhibited in the West. With one exception, all the objects come from official public collections in Gansu Province and the Ningxia Hui Autonomous Region, a ...