TOC: Discourse on the Method of Rightly Conducting the Reason and Seeking Truth in the Sciences; Meditations on the First Philosphy; The Principles of Philosophy; Demonstrations of the Existence of Deity; Notes by the Translator: Perception, Idea, Objective Reality, From or Through the Senses, Thought, Innate Ideas, Formally and Eminently, Pure Intellection, Motion, Second Element.