T80 



INDEX. 



commutativeness, 35, 160 ; dis- 

 junctive relation, 71 ; unity, 72, 

 157, 162 ; identity, 74 ; contra- 

 diction, 74, 82 ; duality, 73, 74, 

 81, 97, 169 ; homogeneity, 159 ; 

 error, 374 ; continuity, 615 ; of 

 Boyle, 619 ; natural, 737. 



Laws, of thought, 6 ; empirical 

 mathematical, 487 ; of motion, 

 617 : of botajiical nomenclature, 

 727 ; natural hierarchy of, 74*2. 



Least squares, method of, 386, 393. 



Legendre, on geometry, 275 ; re- 

 jection of observations, 391 ; 

 method of least scjuares, 377. 



Leibnitz, 154, 163 ; on substitution, 

 21 ; propositions, 42 ; blunder in 

 probability, 213 ; on Newton, 

 515 ; continuity, 618. 



Leslie, differential thermometer, 

 345 ; radiating power, 425 ; on 

 affectation of accuracy, 482. 



Letters, combinations of, 193. 



Leverrier, on solar parallax, 562. 



Lewis, Sir G. 0., on time, 307. 



Life is change, 173. 



Light, intensity of, 296 ; unit, 324 ; 

 velocity,' 535, 560, 561 ; science of, 

 538 ; total reticction, 650 ; waves 

 of, 637 ; classification of, 731. 



Lighthouses, Babbage on, 194. 



Limited identities, 42; inference of 

 59. 



Lindsay, Prof. T. M., 6, 21. 



Linear variation, 474. 



Linnaeus on synopsis, 712 ; genera 

 and species, 725. 



Liquid state, 601, 614. 



Locke, John, on induction. 121 ; 

 origin of number, 157; on proba- 

 bility, 215 ; the word power, 221. 



Lockyer, J. Norman, classification 

 of elements, 676. 



Logarithms. 148 ; errors in tables, 

 242. 



Logic, etymology of name, 5. 



Logical abacus, 104. 



Logical alphabet, 93, 116, 173, 417, 

 701 ; table of, 94 ; connection 

 with iirithnu'tical triangle, 189 ; 

 in probability, 205. 



Logical conditions, numerical mean- 

 ing of, 171. 



Logical machine, 107. 



Logical relations, number of, 142. 



Logical slate, 95. 



Logical truths, certainty of, 153. 

 Lottery, the infinite, 2. 

 Lovering, Prof., on ether, 606. 

 Lubbock and Drinkwater-Bethune, 



386, 395. 

 Lucretius, rain of atoms, 223, 741 ; 



indestructibility of matter, 622. 



Machine, logical, 107. 



Macleay, system of ' classification, 

 719. 



Magnetism of gases, 352. 



Mallet, on earthquakes, 314. 



Mains, polarised light, 530. 



Mammalia, characters of, 681. 



Manchester Literary and Philo- 

 so]ihical Society, papers quoted, 

 137, 143, 168. 



Mansel, on disjunctive propositions, 

 69. 



Mars, white spots of, 596. 



Maskelyne, on personal error, 347 ; 

 deviation of plumbline, 369 ; 

 density of earth, 566. 



Mass, unit of, 317, 325. 



Mathematical science, 767 : incom- 

 pleteness of, 754. 



Matter, uniform properties of, 603 ; 

 variable pro)ierties, 606. 



Matthiessen, 528. 



Maxinuun points, 371. 



Maxwell, Professor Clerk, on the 

 balance, 304 ; natural system of 

 standards, 311, 319 ; velocity of 

 electricity, 442 ; on Faraday, 

 580 ; his book on Matter ami 

 Motion, 634. 



Mayer, propo.^ed repeating circle, 

 290 ; on mechanical equivalent of 

 heat, t)68, 572. 



Mean, etymology of, 359-360 ; 

 geometric, 362 ; fictitious, 363; 

 precise, 365 ; probable, 385 ; 

 rejection of, 389 ; method of, 

 357, 554. 



Mean erroi-, 387. 



Meaning, of names, 25 ; of propo- 

 sitions, 47. 



Measurement, of phenomena, 270 ; 

 methods of, 282 ; instruments, 

 284 ; indirect, 296 ; accuracy of, 

 303 ; units and standards of, 305 ; 

 explained results of, 554 ; agree- 

 ment of modes of, 564. 



Mediate statements, 144. 



Melodies, possible number of, 191. 



