Notes
- . Published in hardcover as The Twentieth‐Century Science, ed. Gerald Holton (New York: W. W. Norton & Co., 1972).
- . Lawrence J. Henderson, The Fitness of the Environment (Boston: Beacon Press, 1959; first published by Macmillan Co., 1913).
- . Gunther S. Stent, “DNA,” in Twentieth‐Century Sciences, pp. 198–226.