784 



INDEX. 



method of inference, 89 ; for 

 calculation of combinations. 180 ; 

 of probabilities, 203 ; of inverse 

 method, 257 ; for elimination of 

 error, 353. 



Rumford, Count, experiments on 

 heat, 343, 350, 467. 



Ruminants, Cuvier on, 683. 



Russell, Scott, on sound, 541. 



SAMPLE, use of, 9. 



Sandeman, on perigou, 306 ; ap- 

 proximate arithmetic, 481. 



Saturn, motions of satellites, 293 ; 

 rings, 293. 



Schehallien, attraction of, 369, 56(5. 



Schottus, on combinations, 179 



Schwabe, on sun-spots, 452. 



Science, nature of, 1, 673. 



Selenium, 663, 670. 



Self-contradiction, 32. 



Senior's definition of wealth, 75. 



Senses, fallacious indications of, 

 276. 



Seven, coincidences of number, 262 ; 

 fallacies of, 624. 



Sextus, fatality of name. 264. 



Sieve of Eratosthenes, 82, 123, 139. 



Similars, substitution of, 17. 



Simple identity, 37, 111 ; inference 

 of, 58 ; contrapositive, 86 ; in- 

 duction of, 127. 



Simple statement, 143. 



Simplicity, law of, 33, 58, 72. 



Simpson, discovery of property of 

 chloroform, 531. 



Simultaneity of knowledge, 34. 



Singular names, 27 ; terms, 129. 



Siren, 10, 298, 421. 



Slate, the logical, 95. 



Smeaton's experiments, on water- 

 wheels, 347 ; windmills, 401, 

 441. 



Smee, Alfred, logical machines, 107. 



Smell, delicacy of, 437. 



Smithsonian Institution, 329. 



Smyth, Prof. Piazzi, 452. 



Socrates, on the sun, 611. 



Solids, 602. 



Solubility of salts, 279. 



Some, the adjective, 41, 56. 



Sorites, 60. 



Sound, observations on, 356 ; un- 

 dulations, 405, 421 ; velocity of, 

 571 : classification of sounds, 



Space, relations of, 220 



Species, 698 ; infima, 701 ; natural, 

 724. 



Specific gravities, 301 ; heat of air, 

 557. 



Spence, on boiling point, 546. 



Spencer, Herbert, nature of logic, 

 4, 7; sign of equality, 15; 

 rhythmical motion, 448 ; abstrac- 

 tion, 705 ; philosophy of, 718, 

 761, 762. 



Spectroscope, 437. 



Spectrum, 583. 



Spiritualism, 671. 



Spontaneous generation, 432. 



Standards of measurement, 305 ; 

 the bar, 312 ; terrestrial. 314 ; 

 pendulum, 315; provisional, 318 ; 

 natural system, 319. 



Stars, discs of, 277 ; motions of, 

 280, 474; variations of, 281 ; 

 approach or recess, 298 ; standard 

 stars, 301 ; apparent diameter, 

 390 ; variable, 450 ; proper mo- 

 tions, 572 ; Bruno on, 639 ; new, 

 644 ; pole-star, 652 ; conflict with 

 wandering stars, 748. 



Stag, M., his balance, 304 ; 011 

 atomic weights, 464. 



Statements, kinds of, 144. 



Statistical conditions, 168. 



Stevinus, on inclined plane, 622. 



Stewart, Professor Balfour, on re- 

 sisting medium, 570 ; theory of 

 exchanges, 571. 



Stifels, arithmetical triangle, 182. 



Stokes, Professor, on resistance, 

 475 ; fluorescence, 664. 



Stone, E. J., heat of the stars, 370 ; 

 temperature of earth's surface, 

 452 ; transit of Venus, 562. 



Struve on double stars, 247. 



Substantial terms, 28. 

 . Substantives, 14. 



Substitution of similars, 17, 45, 

 49, 104, 106 ; anticipations of, 

 21. 



Substitutive weighing, 345 



Sui generis, 629, 728. 



Sulphur, 670. 



Summum genus, 93, 701. 



Sun, distance, 560 ; variations of 

 spots, 452. 



Superposition, of small eifect.s, 450 ; 

 small motions, 476. 



Swan, "W., on sodium light. 430 



