The following abbreviations are used to reference Berkeley’s works: PC “Philosophical Commentaries‘ Works 1:9--104 NTV An Essay Towards a New Theory of Vision Works 1:171--239 PHK Of the Principles of Human Knowledge: Part 1 Works 2:41--113 3D Three Dialogues between Hylas and Philonous Works 2:163--263 DM De Motu, or The Principle and Nature of Motion and the Cause of the Communication of Motions, trans. A.A. Luce Works 4:31--52.