1. Theodore W. Richards, “Atomic Weights,” Nobel Lecture, reprinted inNobel Lectures: Chemistry 1901–21(Amsterdam: Elsevier, 1966), pp. 280–81. The prize was awarded in 1914 but the lecture was given after the war, in 1919.
2. Ida Freund,The Study of Chemical Composition: An Account of its Method and Historical Development(New York: Dover, 1968), p. 593.