Eternity of the world, 242. Ether, 225. Etheric souls, 199. Ethics, fundamental law of, 350. Evolution, theory of, 54, 239, 243. chief element in, 267. Experience, 16. Extra-mundane God, 288. Faith, confession of, 303. of our fathers, 304. Family, the, and Christianity, 357. Fate, 272. Fechner, 97, etc. Fecundation, 63. Fetishism, 276. Feuerbach (Ludwig), 295. Flechsig, 183. Foetal membranes, 66. Folk-psychology, 103. Forces, conversion of, 231. Frederick the Great, 194, 315. Galen, 23, 40. Gaseous souls, 199. vertebrates, 288. Gastræa, 160. theory of the, 60. Gastræads, 159. Gastrula, 61. Gegenbaur, 25, 30. Generation, theory of, 55. Genus, 73. Geology, periods of, 270. progress of, 373. Germinal disk, 57. Gills, 65. God, 275. the father, 277. the son, 277, 328. Goethe, 20, etc. Goethe's monism, 331. Golden Rule, the, 351. Gospels, 312. Gravitation, theory of, 217. Gut-layer, 159. Haller, 42. Harvey, 42. Helmholtz (Hermann), 213, 230. Heredity, psychic, 138. Hertz (Heinrich), 225. Hippocrates, 23. Histology, 26. Histopsyche, 156. Hoff (Carl), 250. Holbach (Paul), 193. Holy Ghost, 277, 326. Humboldt (Alexander), 343. Hydra, 161. Hylozoism, 289. Hypothesis, 299. Iatrochemicists, 45. Iatromechanicists, 45. Ideal of beauty, 338. of truth, 337. of virtue, 339. Ignorabimus, 180. Immaculate conception, 326. Immaterial substance, 221. Immortality of animals, 201. of the human soul, 188. of unicellular organisms, 190. personal, 192. Imperfection of nature, 264. Imponderable matter, 225. Impregnation, 64. Indeterminists, 130. Induction, 16. Indulgences, 359. Infallibility of the pope, 324. Instinct, 105, 123. Intellect, 125, etc. Intramundane God, 288. Introspective psychology, 95. Islam, 284. Janssen (Johannes), 316. Jehovah, 283. Journeys on foot, 364. Kant, 258, etc. Kant's metamorphosis, 92, etc. Kinetic energy, 231. theory of substance, 216. Kölliker, 26, 48. Lamarck, 76, etc. Lamettrie, 194. Landscape-painting, 343. Language, 126. study of, 363. Last judgment, 209. Lavoisier, 212. Leap of the gospels, miraculous, 312. Leydig, 27. Life, definition of, 39. Limits of our knowledge, 182. Love, 357. of animals, 355. of neighbor, 350. of self, 350. Lucretius Carus, 290. Lunarism, 281. Luther, 320. Lyell, 77, 250. Madonna, cult of the, 284, 327. Malphigi, 54. Mammals, 30, etc. Mammary glands, 31. Man, ancestors of, 82. Marsupials, 32, 86. Mass, 222. Materialism, 20. Mayer (Robert), 213, 377. Mechanical causality, 366. explanation, 259. theory of heat, 247. Mechanicism, 259. Mediterranean religions, the, 282. Memory, cellular, 12O. conscious, 121. histionic, 121. unconscious, 121. Mephistopheles, 279. Metabolism, 232.