Book I, Part 1: Proem

Book I, Part 2: Substance is Eternal

Book I, Part 3: The Void

Book I, Part 4: Nothing Exists per se Except Atoms and the Void

Book I, Part 5: Character of the Atoms

Book I, Part 6: Confutation of Other Philosophers

Book I, Part 7: The Infinity of the Universe

Book II, Part 1: Proem

Book II, Part 2: Atomic Motions

Book II, Part 3: Atomic Forms and Their Combinations

Book II, Part 4: Absence of Secondary Qualities

Book II, Part 5: Infinite Worlds

Book III, Part 1: Proem

Book III, Part 2: Nature and Composition of the Mind

Book III, Part 3: The Soul is Mortal

Book III, Part 4: Folly of the Fear of Death

Book IV, Part 1: Proem

Book IV, Part 2: Existence and Character of the Images

Book IV, Part 3: The Senses and Mental Pictures

Book IV, Part 4: Some Vital Functions