1. A. S. Eddington quoted by J. H. Hendry in ‘The Scientific Origins of Controlled Fusion Technology’, Annals of Science, 44, 1987, pp. 143–86.
2. See inter alia E. Teller, ‘The Work of Many People’, Science, 25 Feb. 1955, and Better a Shield than a Sword, p. 66; R. Rhodes, The Making of the Atomic Bomb, pp. 370–1.
3. See J. H. Hendry, (op. cit.).
4. S. M. Ulam, Adventures of a Mathematician, p. 51; H. F. York, The Advisors, p. 20.
5. Heavy water (D20) contains heavy hydrogen atoms (deuterium — D). Heavy water was discovered by the American chemist Harold Urey in 1932 and the first sample of heavy water was produced in the United States in 1933 by Gilbert Lewis.