784 



INDEX. 



Leibisch, ' Physikalische Krystallogra- 

 phie,' i. 443. 



Liebreich, Oscar, discovered action of 

 chloral, i. 93. 



Life and mind, ii. 216 ; what are they ? 

 462 ; mental, 496. 



Life, problem of, ii. 352 ; what is it ? 

 381 ; Bichat's definition of, 383 ; 394 ; 

 and mind, .548. 



Light, the undulatory theory of, i. 241, 

 ii. 153 ; i. 229, 236 ; theories of, ii. 8 ; 

 undulatory and emission theories, 

 11 ; undulatory theory prepared by 

 acoustics, 12 ; and sound, mechanical 

 difl'erence between, 30; speed of, 36 ; 

 corpuscular theory of, ib. ; speed, 45 ; 

 magnetisation of (Faraday), 74. 



Limits, method of, ii. 706 ; Hankel on, 

 ih. 



Lindemann, researches of, ii. 124 ; on 

 transcendency of number tt, 731. 



Link, ii. 230 ; observations of, 261. 



'Linnajan Society, Transactions of,' i. 

 41. 



Linnseus, contributions to study of 

 natural history, i. 116; beginning of 

 geometrical crystallography, 117 ; 119 ; 

 system and nomenclature of, 126; 145; 

 classification of living beings, 288 ; 

 system of classification, ii. 220, 221, 

 232 ; basis of classification of veget- 

 able and animal kinfjdom, 234 ; first 

 four classes of, 238 ; 243, 251 ; classifi- 

 cations, 254, 336 ; 311. 



Lionardo da Vinci, rules of perspective, 

 ii. 663. 



Liouville recognised merits of Green's 

 work, i. 247 ; publishes Galois' 

 works, ii. 686 ; 726, 727. 



Lister, improvements in microscope, ii. 

 228. 



Listing, J. B., 'Vorstudien zur Topo- 

 logie,' ii. 63. 



Literature, French, influence of science 

 on, i. 104. 



Lloyd, Humphrey, experiments in re- 

 fraction, ii. 43. 



Lobatchevsky, Vasiliev on, i. 161 ; ii 

 635 ; and Gauss, 652 ; pupil of Bar 

 tels, 653 ; 710, 713, 718. 



Locke, David Hume and, i. 47 ; 144 , 

 influence of, on German thought and 

 literature, 212 ; and Kant, 219 

 school of, 250 ; influence on educa 

 tional views in England, 253 ; influ- 

 ence on French philosophy, 273 ; new 

 line of thought adopted by, 311 ; 

 sensualistic philosophy, ii. 323 ; 

 psycho-physical view, 471 ; genesis of 



space perception, 473 ; 497 ; genetic 

 view, 506 ; 516 ; language, 536 ; 751. 



Lockyer, Sir Norman, nature of ele- 

 ments, ii. 192 ; 282 ; genesis of the 

 cosmos, 360; 'Inorganic Evolution,' 

 369. 



Lodge, Sir 01., "The Second Law of 

 Thermodynamics," i. 331; 370; on 

 "action at a distance," 380; on the 

 ether, ' Modern Views of Electricity,' 

 ii. 38, 90, 163 ; popularisation of 

 Maxwell's electro - magnetic theorj^, 

 73 ; illustrations of Maxwell's theory, 

 90, 94. 



Lommel, Ohm's 'Gesammelte Abhand- 

 lungen,' i. 365. 



Longet, Bell's theorem, i. 293. 



Longitude, Board of, i. 113 ; prize 

 offered by, 158. 



Longitudes, Bureau des, i. 113. 



Lorentz, H. A., mathematical theories 

 of electricity, ii. 193 ; 195 ; quoted, 

 195, 197. 



Lorenz, 0., quoted on division of history 

 into centuries, i. 13 ; ' Die Geschichts- 

 wissenschaft,' 206. 



Loria, Gino, i. 275. 



Lotze, Hermann, definition of "reality," 

 i. 32 ; contrasted with Herbert Spen- 

 cer, 48 ; quotation from ' Microcos- 

 mus,' 52 ; definition of philosophy, 

 65 ; constructive ideas of, 81 ; and 

 Fechner, 200; lectures on "encyclo- 

 pedia" of philosophy, 215 ; mechanical 

 view in biology of, 219 ; 220 ; phil- 

 osophy of, ii. 288 ; 401 ; "Leben und 

 Lebenskraft, " 401 ; 405 ; vitalism and 

 animism, 407 ; purpose and will, 408, 

 409 ; vitalism, 434 ; anticipated Helm- 

 holtz, 491 ; 492 ; influence of Herbart 

 on, 494 ; physiology of the soul, 500 ; 

 psycho-physics of vision, 504 ; theory 

 of "local signs," 508; medical psy- 

 chology, 512 ; psycho-physics, 517 ; 

 ' Microcosmus,' 532; 549; quoted, 

 585 ; on non-Euclidean geometry, 716. 



Louis XV., i. 107 ; and botany, ii. 235. 



Love, A. E. H., 'Dynamics,' ii. 183. 



Lowth, 'Lectures on Hebrew Poetry,' 

 ii. 537. 



Lubbock, Sir John, ii. 415 ; anthropol- 

 ogist, 497. 



Lucretius, scientific speculations of, i. 

 313; the "atomic theory," 385; 

 quoted, ii. 4. 



Ludwig, F., mathematical botany, ii 

 622. 



Ludwig, K. F. W., Eloge of Weber, ii. 

 396 ; ' ' automatic curve-plotting, " 403. 



