Abruptness (in Ingression), 239. Absolute, The, 129. Abstract, 221. Abstraction, 233, _e.s._ Abstraction (in Mathematics), 28, _e.s._ Abstractive Hierarchy, 234, _e.s._ Acceleration, 66. Actualisation, 222. Adam Smith, 280. Aeschylus, 14. Alexander, S., _preface_. Algebra, 42, 44. Alva, 2. Ampère, 139. Analytical Character (Eternal Objects), 228. Anselm, St., 80. ‘Any,’ 229. Aquinas, Thomas, 12, 13, 205. Arabic Arithmetical Notation, 42. Archimedes, 7, 8, 9, 10. Arguments (of functions), 44. Aristotle, 7, _e.s._; 41, 42; 64, _e.s._; 180, 187; 236, _e.s._ Arnold, Matthew, 115. Art, 279, _e.s._ Art, Medieval, 18, _e.s._ Aspect, 98; 146, _e.s._ Associated Hierarchy, 237. Aston, F. W., 260. Atom, 140, 144. Augustine, Saint, 266. Bacon, Francis, 11; 56, _e.s._; 92, 136. Bacon, Roger, 7. Base of Abstractive Hierarchy, 235. Being, 227. Belisarius, 19. Benedict, Saint, 21. Bergson, 72; 202, _e.s._ Berkeley, George, 93, _e.s._; 105, 120, 198. Bichât, 141. Biology, 58, 88, 144. Bonaventure, Saint, 12. Boyle, Robert, 57. Brown University, _Preface_. Bruno, Giordano, 1. Byzantine Empire, 19. Carlyle, 85. Cervantes, 56. Change, 121. Chaucer, 22. China, 8, 106. Clairaut, 85, 193. Classification, 41, _e.s._ Clough, A. H., 115. Cognition, 97. Coleridge, 115, 116. Columbus, 22, 49. Complex Eternal Objects, 232. Components, 232. Conic Sections, 42. Connexity (of a Hierarchy), 235. Connectedness (of an occasion), 237. Conservation of Energy, 142, _e.s._ Continuity, 140. Copernicus, 1, 22, 56, 184. Cosmas, 254. Cromwell, Oliver, 23. D’Alembert, 80, 85. Dalton, John, 140, 141. Da Vinci, Leonardo, 60. Darwin, 263. Democritus, 140. Demos, R., _Preface_. Density, 70, 189. Desargues, 78. Descartes, 25; 43, _e.s._; 56, 57; 104; 115; 195, _e.s._; 272. Determinism, 110. Differential Calculus, 78. Discontinuous Existence, 51; 190, _e.s._ Distance, 173. Divinity, Scholastic, 17. Divisibility, 177. Education, 277, _e.s._ Egyptians, 20, 43. Einstein, 14, 41, 86, 88; 173, _e.s._; 263. Electron, 50, _e.s._; 111, _e.s._; 185, _e.s._ Empty Events, 214. Endurance, 121; 147, _e.s._; 169, _e.s._; 186, _e.s._; 212. Endurance, Vibratory, 51. Energy, Physical, 51, _e.s._ Environment, 155, _e.s._ Envisagement, 148, _e.s._ Epochs, 177. Epochal Durations, 192. Essence, 175. Eternal Objects, 121, _e.s._; 146, _e.s._; 221, _e.s._ Ether, 184. Euripides, 14. Event, 102; 168, _e.s._ Evolution, 130; 142, _e.s._ Exhaustion, Method of, 42. Extension, 177. Extensive Quantity, 178. External Relations, 223, _e.s._ Extrinsic Reality, 146. Fallacy of Misplaced Concreteness, 72, _e.s._; 82. Faraday, 139. Fate, 14. Fermat, 78. Finite Abstractive Hierarchy, 235. Form, 230. Force, 64, _e.s._ Fourier, 85. Francis of Assisi, 258. Frederick, the Great, 89. Frequency, 181, _e.s._ Fresnel, 139. Frost, Robert, 22. Future, 245, _e.s._