1. Thomas De Quincey, Suspiria de Profundis, Confessions of an English Opium Eater and Other Writings, ed. and intro. Grevell Lindop (Oxford: Oxford Univ. Press, 1985), 156.
2. Quoted in Edward Lurie, Louis Agassiz: A Life in Science (Chicago: Univ. of Chicago Press, 1960), 98.
3. Goethe, Wilhelm Meisters Journeyman Years or The Renunciants, Goethes Collected Works, vol. 10, trans. Krishna Winston and ed. Jane K. Brown (New York: Surkamp, 1989), 279.
4. D. Cameron, “Early Discoveries XXII, Goethe, Discoverer of the Ice Age,” Journal of Glaciology 5 (1965): 751–4.
5. Goethe, Scientific Studies: Collected Works, vol. 12, ed. Douglas Miller (Princeton, NJ: Princeton Univ. Press, 1988), 29.