INDEX 



Occulta •vii'in causation, i. 227. 

 Oersted, H. C, magnetic action, 2. 



30- 

 Oken, Lorenz, i. 112. 

 Olbers, H. W. M,, asteroids, 2. 



269. 

 Olfactory sensations, 3. 186. 

 Omne •vi'vum ex vi-voj 2. 343, 347. 

 Orbit, eccentricity of the earth's, 2. 



Orchids, fertilization of, 3. 84. 

 Organic matter, direction of motion 



in, 3. 211. 

 Origin, proximate and ultimate, 2. 



9^ 



Ornithodelphia, 3. 72. 

 Owen, Richard, 4. 191 n 

 Oxygen, in organic matter, 2. 212. 



Pain, and pleasure, 4. 108 j and sin, 



Z97 J mystery of, 305. 

 Palaeontology and Darwinism, 3. 



54. 

 Pangenesis, 3. 66. 

 Pantheism, 4. 249, 

 Paracelsus, A. T. B., vital principle, 



2- 344- 

 Parental affection, and prolongation 



of infancy, 4. 132. 

 Patriotism, 3. 301. 

 Pearson, xlii, i. 181 n. 

 Pedigree of an hypothesis, 2. 371. 

 Pen and feather, derivation of, 2. 



383- 



Pendulum, Borda's experiment, 2. 

 75 ; rhythm of, 167, 



Perception, implies recognition, i. 

 I7> 3- 156; and discrimination, 

 I. 15, 3. 158 ; visual, 157 j and 

 reasoning, 161 ; and sensation, 

 164, 171 ; rise of, 228. See 

 also Cognition. 



Personality incompatible with infinity, 

 4. 227. 



Phenomena, definition of, I. 28. 



Phenomenon and noumenon, xlviii, 

 105-141. 



Philip II., 4. 347. 



Philology , Ixivj and evolution, 2. 



379 ; absence of transitional forms, 

 3-48. 



Philosophy, scope of, xlvii, i. 31- 

 64* 3- 361 ; and science, com- 

 pared, I, 56-64; as an organon, 

 liv, 2. 71-101 ; critical attitude 

 of, 4. 321-372. 



Phosphorus and thought, 4. 268. 



Phrenology, 3. 107, 196 n. 



Physics, in Comte's system, 2. ll j 

 when constituted as a science, 22, 

 25 ; how divided, 27 ; the science 

 of experiment, 84 ; and metaphy- 

 sics, 186. 



Physiology, 2. 53. 



Picard, Jean, i. 164. 



Planetary evolution, 2. 249-311. 



Planetary motion, studied by subjec- 

 tive and objective methods, i. 

 157; rhythm of, 2. 163, 171. 



Planets, source of their heat, i. 253 j 

 sizes of, 264 ; genetic rings, 266 ; 

 physical condition of, 279 ; their 

 ultimate fate, 307. 



Plant life, chemical differentiations 

 in, 2. 222 ; and solar energy, 328. 



Plateau, 'nebular theory, 2. 259. 



Plato, I. 32; truth, 145 ; reminis- 

 cence, 146 ; creation, 149 ; and 

 Comte, 150 n., 205; source of 

 good and evil, 4. 222. 



Pleasure, and pain, 4. 108 ; and 

 morality, 123. 



Political economy, 2. 53. 



Politics and evolution, 4. 361. 



Polyp and law of adjustment, 3. 100, 

 125. 



Polytheism, I. 248. 



Positivism, ix, xliii, li, 4. 342-355 ; 

 relations with idealism, i. 119- 

 121 ; antagonistic to Cosmism, 

 ix, I. 136, 214, 259, 273, 2. 

 113 5 and Cosmism, 102-116; 

 five fundamental propositions of, 

 105. 



Possibilities of thought coextensive 

 with possibilities of things, i. 34, 

 171. 



Power, Infinite, source of all phe- 



385 



