INDEX. 



779 



with ])arti;il identities, 55 ; by- 

 sum of ])iedicates, CI ; by dis- 

 junctive propositions, 76 ; indi- 

 rect nu'tliod of, 81 ; nature of, 

 118; piineiplft of mathematical, 

 162 ; certainty of, 236. 

 Infima species, 701, 702. 



Infiniteuess of universe, 738. 



Inflection of light, 420. 



Instantia;, citantes, evocantes, radii, 

 curriculi, 270 ; monodica?, irregu- 

 lares, heteroclitit;, 608 ; clandcs- 

 tina3, 610. 



Instninients of measurement, 284. 



Insullicient enumeration, 176. 



Int(;gr;ttion, 12'{. 



Intellect, etymology of, 5. 



Intension of logical terms, 26, 48 ; 

 of propositions, 47. 



Interchangeable system, 20. 



Interpolation, 495 ; in meteorologj', 

 497. 



Inverse, process, 12 ; operation, 122, 

 689 ; i)roblem of two classes, 134 ; 

 j)pjblem of three classes, 137 ; 

 IJroblem of probability, 24i), 251 ; 

 rules of inverse method, 257 ; 

 simjjle illustrations, 253 ; general 

 solution, 255. 



Iodine, the substance X, 523. 



Iron, j)roperties of, 528, dJit. 



Is, ambiguity of verb, 16, 41. 



Isomori)lii:->ni, 6^2. 



Ivory, 375. 



Jamks, Sir H , on density of earth, 

 5G7. 



Jenkin, Professor Fleming, 328. 



Jevous, W. S., ou use of mean, 361 ; 

 on pedesis or molecular move- 

 ment of microscopic particles 406, 

 549 ; cirrous clouds 411 ; spec- 

 trum analysis, 429 ; elevated 

 rain-gauges, 430 ; experiments 

 on clouds, 447 ; on muscular 

 exertion, 490 ; resisting medium, 

 570 ; anticipations of the electric 

 telegraph, 671. 



Jones, Dr. lience, Life of Faraday, 

 578. 



.Tordanus, on the mean, 360, 



Joule, 545 ; on thermojiile, 299, 

 300 ; mechanical eipiivalcnt of 

 heat, 325, 347, 568 ; temperature 

 of .'lir, 343 ; raiofaction, 444 ; 

 on Thouison's prediction, 543 ; 



molecular theory of gases, 548 ; 

 friction, 549 ; thermal pheno- 

 mena of fluids, 557. 

 Jupiter, .satellites of, 372, 458, 638, 

 656 ; long inec^uality of, 455 ; 



figure of, 556. 



Kames, Lord, on bifurcate classifi- 

 cation, 697. 

 Kant, disjunctive propositions, 69 ; 



analogy, 597 ; doctrine of space, 



769. 

 Kater's penduhtm, 316. 

 Keill, law of emanating forces, 464 ; 



axiom of simplicity, 625. 

 Kepler, on star-discs, 390 ; comets, 



408 ; laws of, 456 ; refraction, 



501 ; character of, 578. 

 Kinds of things, 718. 

 King Charles and the Royal Society, 



647. 

 Kirchhoff", on lines of spectrum, 245. 

 Kohlrausch, rules of apj)roximate 



calculation, 479. 



Lagrange, formuLa for interpola- 

 tion, 497 ; accidental discovery, 

 531 ; union of algebra and geo- 

 metry, 633. 



Lambert, 15. 



Lam out, 452. 



Language, 8, 628, 643. 



Laplace, on probability, 200, 216 

 jirinciples of inverse method, 242 

 solution of inverse problem, 2.'i6 

 planetary motions, 249, 250 

 coiijtmctions of planets, 293 , 

 observation of tides, 372 ; at- 

 mospheric tides, 367 ; law of 

 errors, 378 ; dark stars, 404 ; 

 hyperbolic comets, 407 ; liis 

 works on probability, 395; ve- 

 locity of gravity, 435 ; stability 

 of planetary .sy.stern, 448, 746 ; 

 form of Jupiti'r, 556 ; corpuscular 

 theoiy, 521 ; ellijiticity of earth, 

 565 ; velocity of sound, 671 ; 

 analogy, 597 ; law of gravity, 

 615 ; inhabitants of i)lanets, 640 ; 

 laws of motion, 706 ; ])o\ver of 

 science, 739. 



Lavoisier, nustaken inference of, 

 238 ; pyrometer, 287 ; on cxpeii- 

 ments, 423 ; prediction of, 544 ; 

 theory, 611 ; on acids, 667 



LiiW, 3 ; of simplicity, 33, 7^:, KJ ; 



