Roy Chapman Andrews, 76, naturalist, former director of the American Museum of Natural History, 11 March 1960.

Walter Baade, 67, astronomer, first to describe supernovas, 25 June 1960.

Charles William Beebe, 84, biologist and explorer, 4 June 1962.

John Joseph Bittner, 56, geneticist whose researches in cancer were far-reaching, 14 December 1961.

Percy William Bridgman, 78, mathematician and physicist, 20 August 1961.

Dirk Brouwer, 63, Dutch-American astronomer and geophysicist, 31 January 1966.

Rachel L. Carson, 56, marine biologist and author of The Silent Spring (1962), which was instrumental in beginning the environmental movement in the United States, 14 April 1964.

William Weber Coblentz, 88, physicist, 15 September 1962.

Arthur Holly Compton, 69, physicist, winner of the 1927 Nobel Prize in physics for his work in quantum physics, 15 March 1962.

Peter Joseph Debye, 82, Dutch-American physical chemist, winner of the 1936 Nobel Prize in chemistry, 2 November 1966.

Lee DeForest, 87, inventor of one of the earliest processes for sound motion pictures, 30 June 1961.

James Franck, 81, physicist, worked on the Manhattan Project, though he opposed actually using the atomic bomb, 21 May 1964.

Casimir Funk...