Pierre Jacquet, "History of Orchids in Europe, from Antiquity to the 17th Century," ''Orchid Biology: Reviews and Perspectives 6 (1994), as cited by Joseph Arditti, Orchid Biology (Kluwer Academic Publishers, 2002), p. 27 online.
Charles P. Krauth, A Vocabulary of the Philosophical Sciences (New York 1878), p. 625 online.
Grazia Tonelli Olivieri, "Galen and Francis Bacon: Faculties of the Soul and the Classification of Knowledge," in The Shape of Knowledge from the Renaissance to the Enlightenment (Springer, 1991) online.
Stuart Clark, Thinking with Demons: The Idea of Witchcraft in Early Modern Europe (Oxford University Press, 1999), p. 367 online.
Robert S. Westman, "The Comet and the Cosmos: Kepler, Mästlin, and the Copernican Hypothesis," in The Reception of Copernicus' Heliocentric Theory: Proceedings of a Symposium Organized by the Nicolas Copernicus Committee of the International Union of the History and Philosophy of Science, Torun, Poland, 1973 (Springer, 1973), pp. 10 and 28. For a description and reproduction of Helisaeus Roeslin's diagram, see pp. 28–29 online.
