Norbert J. Roberts, 74, a past president of the New York Academy of Medicine and retired vice president for medicine and environmental health at the Exxon Corp., died Sept. 1 in Bradenton, Fla. A specialist in preventive medicine, he was for many years vice chairman of the American Board of Preventive Medicine and chairman of the Residency Review Committee for Preventive Medicine. He served on the National Cancer Institute's Board of Scientific Counselors.
William Silent Hughes, 84, governor of the New York Stock Exchange from 1966 to 1969 and a governor of the Pacific Stock Exchange from 1978 to 1984, died Sept. 2 in San Marino, Calif.
