Eyes Forward Xenotransplant IIf Microchip Masterpieces Physicists, China Collide Prehistoric Desk Reference In one of his last public appearances before the 1992 presidential election, White House science adviser D. Allan Bromley dwelled somewhat on the past but set his sights on the future. In Philadelphia October 19 to accept an honorary doctorate of science from Drexel University, Bromley, during the presentation ceremony, lauded the Bush administration's achievements in science duri