1. “AT” for the revised Adam and Tannery edition of Descartes’ Oeuvres (Descartes 1969–75).
2. “CSM” for the Cottingham et al. translation of Descartes’ works (Descartes 1984–85).
3. “G” for Gaukroger’s translation of the Treatise on Man (Descartes 1998).
4. “O” for Olscamp’s translation of the Dioptrics (Descartes 1965).
5. Al-Haytham, I. (1989). The optics of Ibn al-Haytham: Books I-III, on direct vision (Vol. 1) (A. I. Sabra, Trans.). London: Warburg Institute. Originally written c.1030.