1. Henry Power, Experimental Philosophy, in Three Books (London: printed by T. Roycroft for John Martin and James Allestry, 1664), p. [xviii] in ?The Preface to the Ingenious Reader.?
2. Henry Power, Experimental Philosophy, in Three Books (London: printed by T. Roycroft for John Martin and James Allestry, 1664), p. [xviii] in ?The Preface to the Ingenious Reader.? [vii?viii].
3. See Gottfried Wilhelm Leibniz, Die philosophischen Schriften, ed. C. I. Gerhardt (Hildesheim: Georg Olms, 1960?1961), IV, 474, 480.
4. Antoni van Leeuwenhoek to Henry Oldenburg, 7 September 1674, in Leeuwenhoek, Alle de Brieven (Amsterdam: Swets & Zeitlinger, 1939-), I, 166?167. Cited hereafter as Leeuwenhoek, A.d.B.
5. Regnier de Graaf to Henry Oldenburg, 18 April 1673, in Oldenburg, Correspondence, ed. and trans. A. Rupert Hall and Marie Boas Hall (Madison: University of Wisconsin Press, 1965-), IX, 602?603.