INDEX. 



619 



•t irLicb its action cTianges, ii. 295 ; 

 overthrows the argument from design, 

 ii. 397. 



fJebulse, constitution of, i. 386 ; distribu- 

 tion of, L 388 ; analogy with comets, 

 L389. 



Nebular hyiJothesis, i. 248, 356—397. 



Necessary truths, i. 24, 47, 62 — 60. 



Negative evidence, i. 56. 



Neptune, discovery of, i. 35 ; ii. 106 ; his 

 retrograde rotation, i. 356, 365 ; forma- 

 tion of, i. 362. 



Nerve-tissue, establishment of transit- 

 lines in, ii. 145. 



Nervous arc, ii. 151. 



Nervous systems, genesis of, 146, 



Newman, J. H., quoted, ii. 500, 



Newton's theory of matter, i. 4 ; theory 

 of gravitation, i. 12, 111, 113; theory 

 of light, i. 130 ; his remark about 

 metaphysics, i. 177 ; his law of the 

 velocity of sound , i. 205 ; his discoveries 

 Uiustrate the helplessness of simple in- 

 duction, i. 266 ; ii. 192 ; his hypothesis 

 of gravitation inconceivable if meta- 

 physically interpreted, i. 272 ; great- 

 ness of his achievements, i. 326. 



Nitrogen as a constituent of organic 

 matter, i. 333. 



Nuance, sense of, i. 29. 



Nutritive and relational systems of organs, 

 it 86. 



Objective and subjective elements in 



cognition, how far separable, i. 50. 

 Objective method defined, i. 109. 

 Observation, i. 241. 

 Occasional causes, i. 24, 158. 

 Occult substrata demoUshed by Berkeley 



and Hume, i. SB. 

 Occulta vis in causation, i. 154. 

 Olfactory sensations, how compounded, 



ii. 128. 

 Omne vivum ex vivo, i. 419. 

 Organic matter, direction of motion in, ii. 



144. 

 Oriental type of civilization, how it has 



originated, ii. 268. 

 Origin, proximate and ultimate, L 248, 



250. 

 Omithodelphia, ii. 50. 

 Ovum of mammals, i. 340. 

 Owen, Kichard, on final causes, U. 384. 



Pain, beneficence of, ii. 157. 

 Pains and pleasures, ii. 327. 

 Pangenesis, ii. 45. 



Pan-FeTIenism, ii. 205. 



Panspermatism, i. 420. 



Pantheism, i. 7 ; ii. 423. 



Paracelsus, i. 419. 



Paraguay Indians and Jesuits, ii. 304. 



Parental feeling correlated with duration 

 of infancy, ii. 343. 



Parkman, F., ii. 247. 



Parmenides of Plato, i. 23. 



Patois, their tendency to disappear, ii. 34. 



Patria Potestas, ii. 220. 



Patriotism, ii. 205. 



Pux Romana, ii. 206. 



Pedigree of a hypothesis as a test of ita 

 value, i. 438. 



Pen a.r\ A feather, i. 446. 



Pendulum, rhythm of, i. 299; Borda'a 

 experiment with, i. 237. 



Perception implies recognition, ii. 107; 

 simple and complex, ii. 112 ; how dif- 

 ferent from sensation, ii. 113 ; rise of, 

 iL156. 



Persistence of Force, i. 40, 283. 



Personality incompatible with infinity, 

 ii. 408. 



Phenomena, definition of, i. 20. 



Philip II., ii. 494; why a fit subject for 

 m.oral disapprobation, ii. 183. 



Philosophy distinguished from science, 

 i. 39—44. 



Phosphorus and thought, ii. 436. 



Phrenology, ii. 74, 135. 



Physics, when constituted as a science, 

 i. 199, 202 ; how divided, i. 203 ; the 

 science of experiment, i. 243 ; ancient 

 and modem meaning of the word, i. 

 279. 



Physiolooncal units, ii. 45. 



Physiology, wherein difierent from psy- 

 chology, ii. 76. 



Planaria, its eye-spot, ii. 90. 



Planes of revolution of asteroids not yet 

 accounted for, i. 372. 



Planetary motions, i. 12 ; ancient theory 

 of, i. 107 ; supposed to bo controlled 

 by archangels, i. 110, 197 ; great com- 

 plexity of, i. 295; rhythm of, 303; 

 gradual retardation of, i. 394. 



Planets, sizes of, i. 366 ; physical condi- 

 tion of, i. 376 ; their ultimate fate, i 

 395. 



Plants, their growth dependent on solai 

 energy, i. 408. 



Plateau's experiment in illustration of the 

 nebular hypothesis, i. 363. 



Plato, i. 23, "99, 102 ; his theory of remi- 

 niscence,i. 100 : compared with Comte, 

 i. 103, 139 ; on tinal causes, ii. 405. 



Pleasures and pains, ii. 327; whynosJ«uji 



