Salvador Luria, 78, a pioneer in the development of modern genetics who had won the Nobel Prize, died Wednesday at his Lexington, Mass., home of a heart attack. Dr. Luria, who retired from the faculty of Massachusetts Institute of Technology, shared the Nobel Prize for medicine or physiology in 1969 with Max Delbruck of the California Institute of Technology and Alfred Hershey of the Carnegie Institution of Washington.
James L. Knight, 81, who helped build Knight-Ridder Inc. into one of the nation's largest publication companies, died Tuesday at St. John's Hospital in Santa Monica, Calif., of a respiratory ailment. Knight-Ridder began with just one paper, the Akron, Ohio, Beacon Journal, owned by Mr. Knight's father, C. L. Knight. It now has 29 dailies.