INDEX. 



619 



t which its action changes, ii. 295 ; 

 overthrows the argument from design, 



Nebulte, constitution of, i. 386 ; distribu 

 tion of, i. 388 ; analogy with comets, 



Nebular hypothesis, i. 248, 356397. 



Necessary truths, i. 24, 47, 5260. 



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 

 illustrate 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. 



N utritive and relational systems of organs, 



a. 86. 



OBJECTIVE and subjective elements in 



cognition, how fai separable, i. 50. 

 Objective method defined, i. 109. 

 Observation, i. 241. 

 Occasional causes, i. 24, 158. 

 Occult substrata demolished by Berkeley 



and Hume, i. 88. 

 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, i. 248, 



250. 



Ornithodelphia, ii. 50. 

 Ovum of mammals, i. 340. 

 Jwen, Richard, on final causes, ii. 384. 



PAIN, beneficence of, ii. -157. 

 Pains and pleasures, ii. 327. 

 Pangenesis, ii. 45. 



Pan-Hellenism, fl. 205. 



Panspennatism, 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. 



Pax Romana, ii. 206. 



Pedigree of a hypothesis as a test of it* 

 value, i. 438. 



Pen and feather, i. 446. 



Pendulum, rhythm of, i. 299; Eorda s 

 experiment with, i. 237. 



Perception implies recognition, ii. 107; 

 simple and complex, ii 112 ; how dif 

 ferent from sensation, ii. 113 ; rise of. 

 ii. 156. 



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 

 moral disapprobation, ii. 183. 



Philo ophy 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 modern meaning of the word, i. 



Physio^oical units, ii. 45. 



Physiology, wherein different 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 be controlled 

 by archangels, i. 110, 197 ; great com 

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

 gradual retardation of, i. 394. 



Planets, sizes o&amp;lt;&quot;, i. 368 ; physical condi 

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

 395. 



Plants, their growth dependent on solar 

 energy, i. 4C8. 



Plateau s experiment in illustration of the 

 nebular hypothesis, i. 363. 



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

 niscence,*. 100 : compared with Comte, 

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



Pleasures and pains, ii. 327; whynoxioui 



