Leonard M. Rieser,76, who as chairman of the board of the Bulletin of the Atomic Scientists was seen in numerous news photographs resetting the hands of the "Doomsday Clock" that FTC the journal uses to dramatize the threat of nuclear war, died of cancer Tuesday at Dartmouth-Hitchcock Medical Center in Lebanon, N.H.

Sister M. Matthia Gores,104, the oldest nun in the international congregation of the School of Sisters of Notre Dame, died Monday in Mankato, Minn. She was also the oldest participant in the "nun's study," a long-term study of aging and Alzheimer's disease.

Edward Allen Hansen,69, former president of the American Guild of Organists who was known as "Mr. Music Man" on a popular children's television show, died Sunday of cancer in Seattle. His melodies on the show "Wunda Wunda" charmed thousands of preschool viewers in the 1950s and 1960s.

Pub Date: 12/19/98