766 



INDEX. 



Dohrn, Anton, seaside laboratory 

 founded at Naples, ii. 232. 



Dbllinger, Ignaz, evolutionist, and the 

 Natiirphilosophie, i. 207 ; scientific 

 researches, ii. 299 ; 303. 



Dollond, not member of any university, 

 i. 238 ; astronomical instruments, 

 322. 



Doinesday-Book, ii. 555. 



Bonders, on language, ii. 538. 



Donner's rendering of the Greek dram- 

 atists, i. 213. 



Doppler, enunciated the principle of 

 Romer's discovery, ii. 10 ; his prin- 

 ciple of wave-motion, 49. 



Dove, meteorology, i. 205. 



Downs, O. G., ii. 579. 



Dreyfus-Brisac, testimony to work of 

 German universities, i. 225. 



Driesch, Hans, ii. 342; " organicisme," 

 455 ; works of, 456 ; 463, 549. 



Drobisch, psychologist, ii. 494, 497 ; 

 pretensions of statistics, 586. 



Drude, P., ii. 38. 



Drummond and Edinburgh University, 

 i. 269. 



Drummond, Henry, ii. 326. 



Drummond, Thomas, spectrum analysis, 

 i. 278. 



Duality, principle of, in geometry, ii. 

 665. 



Dublin school of mathematicians, i. 

 274, ii. 673. 



Du Bois-Reymond, Emil, on the intro- 

 duction of new ideas from abroad, 

 i. 16 ; 45 ; limits of the knowable, 

 53 ; 106 ; the speculative tendency in 

 science, 179; 'Reden,' 188, 215, ii. 

 149 et seq. ; ' Gedachtnissrede auf 

 Joh. Muller,' i. 198, 293; voltaic 

 electricity, 199 ; quoted, 216, ii. 

 270, 381, 469, 478 ; mechanical view 

 of biology, i. 219 ; Bell's doctrine, 

 293 ; ' Akademie der deutschen 

 Sprache,' 298 ; ' Ueber die Grenzen des 

 Naturerkennens,' 348; objections to 

 Kirchhoffs definition of "mechanics," 

 383 ; researches of, ii. 208 ; Eloge of 

 Johannes Muller, 384, 419, 482 ; 391, 

 revolution in physiological studies, 

 396 ; ' Researches in Animal Elec- 

 tricity,' 397 ; 401 ; position in vitalistic 

 controversy, 403 ; essay on Vital 

 Force, 405 ; 408, 409, 411 ; on the 

 principle of natural selection, quoted, 

 414; vitalism, 434; "Darwin versus 

 Galiani," quoted, 435; "Exercise," 

 436 ; active nervous system, 438 ; 

 animal electricity, 475, 476 ; 481 ; 



principle of reflex action, 519 ; 546, 

 743. 



Du Bois - Reymond, Paul, services to 

 scientific reasoning, i. 45 ; 103 ; 

 'Grundlagen der Erkenntniss in den 

 exacten Wissenschaften,' 341 ; 377 ; 

 gravitation " unknowable," 352 ; 

 kinetic theory of gases, 433 ; works 

 of, ii. 631, 705 ; theory of functions, 

 704 ; on arithmetising, 739. 



Du Chatelet, Madame, letter from Vol- 

 taire to, i. 105. 



Duchesne, physiognomy, ii. 477. 



Duclos, on education, i. 259. 



Ducos quoted, i. 109. 



Dufay, controversy on electric fluid, i. 

 362. 



Duhamel, mechanics, i. 44 ; taught 

 metallurgy at the Ecole des Mines, 

 107. 



Duhem (see Prof. Ostwald), ii. 159 ; 

 labours of, Horstmann, 170 ; thermo- 

 dynamic potential, 173 ; ' Mecanique 

 chimique,' 173 ; chemical equilibrium, 

 175. 



Diihring, E., 'Kritische Geschichte der 

 allgemeinen Principien der Mechanik," 

 ii. 97, 101 ; historical and controversial 

 writings, 107. 



Dujardin, Felix, sarcode, ii. 264 ; defini- 

 tion of a cell, 265. 



Dulong and Petit, specific heat of bodies, 

 i. 428, 429. 



Dumas, ' Le9ons sur la Philosophic 

 chimique,' i. 114 ; revives Prout's 

 hypothesis, 402, 403 ; explanation of 

 "isomerism," 406; the "radicle" 

 theory, 409 ; attack on electro- 

 chemical theory, ib. ; 410; "type" 

 theory, 411 ; 4 1 3 ; attitude towards 

 the atomic theory, 418; quoted, 421, 

 ii. 370, 441; i. 402, 428; spectro- 

 scopic observations, ii. 361 ; ' Essai 

 de Statique chimique des Etres 

 organises,' 392 ; substitution in chem- 

 istry, 393 ; 406. 



Duncker, G., statistics of variation, ii. 

 622. 



Duntzer, ii. 531. 



Dupin, Charles, ii. 579 ; 658. 



Dutens, 'Leibnitii Opera Omnia,' ii. 

 280. 



Dutrochet, Bell's theorem, i. 293 ; ii. 

 230, 261. 



Dynamics, ii. 5 ; and statics, 144. 



Eckermann quoted, ii. 253. 

 Ecole centrale des Travaxix publics, i. 

 112. 



