¹ The other three are: De proportionibus proportionum and Ad pauca respicientes, ed. Grant, E. (Madisonet al., 1966)Google Scholar; Le livre du ciel et du monde, ed. Menut, A. D. and Denomy, A. J. (Madisonet al., 1968)Google Scholar; Nicole Oresme and the medieval geometry of qualities and motions. A treatise on the uniformity and difformity of intensities, known as Tractatus de configurationibus qualitatum et motuum, ed. Clagett, M. (Madisonet al., 1968)Google Scholar. We may also mention here Oresme, Nicole, Le livre de politiques d'AristoleGoogle Scholar, ed. Menut, A. D., in Transactions of the American Philosophical Society, lx (1970), Part 6.Google Scholar

² In pp. 645–8 (cf. p. 125, note 12) of his edition of the De configurationibus (op. cit. [1]) Clagett attempts a chronological ordering of all Oresme's known works, but this has to depend to a large extent on an interpretation of how Oresme's thought developed.

³ See note 1.

⁴ Cf. Koyré, A., La révolution astronomique (Paris, 1961), pp. 139, 383Google Scholar, and Walker, D. P., ‘Kepler's celestial music’, Journal of the Warburg and Courtauld Institutes, xxx (1967), 228–50.CrossRefGoogle Scholar

⁵ Cf. Bourbaki, N., Eléments d'histoire des mathématiques (Paris, 1960), pp. 160–2.Google Scholar

⁶ In his Algorismus proportionum and De proportionibus proportionum. Cf. Molland, A. G., ‘The geometrical background to the “Merton School”’, British Journal for the history of science, iv (1968–1969), 108–25, especially 117–19.CrossRefGoogle Scholar

⁷ Cf. Coopland, G. W., Nicole Oresme and the astrologers (Liverpool, 1952), pp. 112, 132–3. I discuss in more detail some of the points raised in this review in ‘Nicole Oresme and scientific progress’, to appear in Miscellanea mediaevalia, ix (1974).Google Scholar

⁸ This would entail some revision of Clagett's chronology. See note 2.