INDEX. 



477 



Metre, error in, i. 368 ; standard, 404. 



Michell, on probabilities, i. 242 ; star- 

 systems, 285 ; star-discs, 455 ; torsion 

 balance, ii. 208 ; Pleiades, 299. 



Milky Way, ii. 299. 



Mill, J. S., on exclusive alternatives, i. 

 83; probability, 227, 245; cause, 

 254 ; inductive inference, 261 ; ii. 

 242 ; deductive method, i. 307 ; ii. 

 136; erroneous remarks on mean, i. 

 448; joint method of agreement, c., 

 ii. 34 ; method of concomitant varia 

 tions, 106 ; collocations, 434. 



Mineralogy, classification in, ii. 349, 

 406. 



Momentum, unit of, i. 375. 



Moon, fallacy concerning, ii. 14; atmo 

 sphere of, 45 ; periods of, 63 ; motions 

 of, 107. 



Muscular, susurrus, i. 348 ; exertion, ii. 

 114. 



N. 



Negative terms, i. 17, 88; premises, 

 75; arguments, ii. 16, 276; results 

 of experiment, 45. 



Newton, Sir Isaac, binomial theorem, 

 i. 266 ; planetary movements, 288 ; 

 intervals of octave, 303 ; velocity of 

 sound, 344; ii. 87, 214; measure 

 ment of light waves, i. 346 ; tides, 

 347; pendulum experiments, 354; 

 ii. 55, 254 ; absolute time, i. 360 ; 

 impact, 403 ; experiments on spec 

 trum, ii. 25, 28, 32 ; Newton s rings, 

 27, 59. 60, 89; inflexion of light, 27; 

 gravity, 29 ; achromatic lenses, 42; 

 resisting ether, 46 ; absorption of 

 light, 58 ; theory of planetary motions, 

 73, 84, 86 ; resisting media, 86 ; 

 differential calculus, 99 ; alchemy, 

 133; knowledge of Bacon s works, 

 134; on hypotheses, 144; natural 

 colours, 147; vortices, 147; corpus 

 cular theory, 151; fits of easy re 

 flection, &c., 154; combustible sub 

 stances, 159; discovery of gravitation, 

 194 ; rules of philosophizing, 258, 

 280 ; undulatory theory, 295 ; nega 

 tive density, 304. 



Newtonian method, ii. 226. 



Noble s chronoscope, i. 360; ii. 270. 



Nomenclature, ii. 418. 



Numbers, prime, 141 ; of Bernoulli!, 

 143; nature of, 175; concrete and 

 abstract, 1 78 ; triangular, 209 ; figu- 

 rate, 212. 



Numerically definite reasoning, i. 190. 



0. 



Observation, ii. i ; distinction from ex 

 periment, 2 ; mental conditions of, 4; 



instrumental and sensual conditions 

 of, 7; external conditions of, 10; 

 weighted observations, i. 449. 



Odours, ii. 424. 



Oersted, ii. 164, 169, 184. 



Order, of terms, i. 40 ; of premises, 131. 



Oscillation, centre of, i. 423. 



Ostensive instances, ii. 259. 



Ozone, ii. 331. 



P. 



Parabola, ii. 74 ; orders of, 95 ; approxi 

 mate, 122. 



Parallax of sun, ii. 203. 



Parallel forces, i. 422 ; ii. 317. 



Paralogism, i. 75, 1 1 8. 



Parity of reasoning, i. 310. 



Partial identities, i. 47 ; inference from, 

 64, 66, 70, 71 ; induction of, 149. 



Particular reasoning, ii, 242. 



Pascal, arithmetical machine, i. 123; 

 arithmetical triangle, 206, 211 ; prob 

 ability, 244,246; barometer, ii. 149. 



Passive state of steel, ii. 326. 



Peculiar property, ii. 377. 



Peirce, i. 27. 



Pendulum, i. 339, 352, 369, 423; ii. 



79. 2 54- 



Perfect induction, i. 164. 

 Perigon, i. 358. 



Permutations, of verses,] . 197; alpha 

 bet, 203 ; cards, 277. 

 Perpetual motion, i. 256 ; ii. 277. 

 Personal error, i. 402. 

 Physical astronomy, ii. 76. 

 Plagihedral crystals, ii. 287. 

 Planets, conjunctions of, i. 205, 212; 



ii. 322 ; coincidences concerning, i. 



304 ; ii. 356. 



Plateau s experiments, ii. 36. 

 Plattes, Gabriel, on divining rod, ii. 



45 ; gradual effects, 49. 

 Plumbline, divergence of, i. 429. 

 Poisson, on probability, i. 280 ; sidereal 



day, 362; works of, 460; Newton s 



rings, ii. 89 ; inflexion of light, 1 74 ; 



crystals, 180. 

 Polarized light, ii. 163, 234, 287, 296, 



318. 

 Pole, of magnet, i. 424 ; of battery, ii. 



29. 

 Pole-star, use of, i. 425 ; errors of 



observation of, 446 ; singularity of, 



ii. 317. 



Porphyry, Isagoge, ii. 376; tree of, 381. 

 Port Royal Logic, i. 26. 

 Pouillet s Pyrheliometer, i. 390. 

 Powell, Baden, ii. 278, 327. 

 Predicates, ii. 375. 

 Prediction, ii. 157, 171 ; in science of 



light, 173; in theory of undulations, 

 176; in other .sciences, 178; by 

 inversion of cause and effect, 181. 



