INDEX. 



783 



author, 50 ; on thought, 66 ; or- 

 ganises scientific effort, 100; "cal- 

 culus," 101 ; modern analytical spirit 

 of, 102 ; letter to Huygens on cal- 

 culus, 103 ; letter to Bodenhausen, 

 104 ; 105 ; ' Schriften,' 122 ; 137 ; at 

 the court of Brunswick, 158 ; the 

 University of Halle, 160 ; encyclo- 

 paedic view of ' Wissenschaft,' 171; 

 modern science, 175 ; reaction against 

 his philosophy, 212 ; notation of, 

 233; 247, 283, 311 ; "energy," 312; 

 337 ; gravitation, 340 ; 358 ; letter to 

 Foucher, ii. 5 ; Euler's opposition to, 

 8 ; "vis viva," 100 ; indestructibility 

 of force, 111 ; influences German 

 philosophy, 205 ; scientific work of, 

 210; 'Protogsea,' 277, 280, 293; 

 ' ' evolutionist, " 278 ; ' Protogsea ' 

 quoted, 281 ; 288 ; epigenesis, 298 ; 



tenetic view anticipated by, 330 ; 

 64, 365 ; animation of all nature, 

 369 ; 403 ; idea of life, 409 ; monad- 

 ology, 500 ; 507 ; doctrine of pre- 

 established harmony, 519 ; (see 

 Herder), 535 ; the theory of language, 

 537 ; statistical information, 546 ; 

 555 ; Neumann's statistical tables, 

 565 ; science of chances, 568 ; theory 

 of probabilities, 573 ; 638, 643 ; his 

 dyadic system, 645 ; on convergency, 

 646 ; letter to Huygens, 659 ; on 

 determinants, 682 ; 706 ; science and 

 religion, 742. 



Leitch, ' Miscellaneous Works ' of Dr 

 Young cited, i. 244. 



Lelievre, i. 136. 



Lemonnier at the Jardin des Plantes, i. 

 107. 



Lenard, discoveries of light rays, ii. 

 92 ; observation of cathode rays, 

 192. 



Lenz, electrical phenomena, ii. 146. 



Le Sage, "ultramundane corpuscles," 

 i. 342 ; 344 ; quoted on Epicurus, 

 ii. 4. 



Leslie, scientific work of, i. 229, 230 ; 

 Scotch university professor, 272. 



Lessing, moralising style of, i. 51 ; and 

 Gibbon, 169 ; 171 ; the scientific ideal 

 of, 211 ; 212. 



Leuckart, Rudolf, ii. 322 ; law of limit 

 of growth, 445. 



Leuwenhoek, perfection of simple micro- 

 scope, ii. 228 ; reference to, 281. 



Leverrier and the discovery of Neptune, 

 i. 277; "Association scientitique," 

 298 ; astronomical achievements of, 

 314 ; meteoric hypothesis, ii. 357. 



Lewes, G. H., on Herbert Spencer, i. 

 48; 'Life of Goethe,' 166; ii. 470; 

 phrenology, 478 ; "specific energies," 

 483 ; 512 ; spinal chord, 519 ; 608. 



Lexis, Prof. , ' Die deutschen Universi- 

 taten, ' i. 226 ; statistics, ii. 566. 



Lhuilier referred to by Steiner, ii. 

 669. 



Lichtenberg of Gottingen University, i. 

 165 ; electricity and the Geissler 

 tubes, ii. 191 ; physiognomy, 477. 



Lichton, John, Louvain University, i. 

 268. 



Lie, Sophus, ii. 686 ; and theory of 

 groups, 690; and Klein, 691, 692, 

 718 ; on differential equations, 696 ; 

 on fundamental problem of geometry, 

 718 ; 720. 



Liebig, J. von, laboratory at Giessen, i. 

 18; ' Jahresbericht der Chemie,' 42; 

 works on chemistry, 43 ; chemical 

 predictions of, 92 ; on Bacon, 93 ; 

 115; 162, 174; temporarily in- 

 fluenced by speculative spirit in 

 German science, 178 ; establishment 

 of chemical laboratories, 188; quoted, 

 190 ; his organic analysis, 191 ; and 

 Wohler, 192; 194; metaphysical 

 leanings of, 196 ; 200 ; influenced by 

 the Naturphilosophie, 207 ; freed 

 under the influence of French science, 

 208 ; underlying idea in founding 

 chemical laboratory, 214; "vital 

 force," 218 ; Dalton's atomic theory, 

 246 ; agricultural experiments, 285 ; 

 'Familiar Letters on Chemistry' 

 quoted, 389; discovery of "isomer- 

 ism," 406; the "radicle" theory, 

 409 ; the hydrogen and the oxygen 

 theory of acids, 410 ; 412 ; quoted on 

 chemical research in England, 414 ; 

 his attitude towards the atomic 

 theory, 418 ; .scientific work of, ii. 

 105; 'Annalen der Pharmacie,' 107, 

 163, 170; Mohr's and Helm's first 

 papers published, 109 ; appreciation 

 of Mohr and Mayer, 114 ; ' Die 

 Organische Chemie,' 115 ; organic 

 chemistry, 117, 391 ; dynamical 

 theory of heat, 128 ; popular work of, 

 149 ; 152 ; (see Thos. Graham), 161 ; 

 biological studies, 208 ; physiological 

 processes, 390 ; 393 ; his influence, 

 394 ; 396 ; attempt to extend the 

 idea of " Stoffwechsel," 397 ; ' Chemi- 

 cal Letters,' 398 ; practical study of 

 nature, 404; "vitalism," 405; 406, 

 411, 420; Bacon's "method of 

 instances," 558. 



