776 



INDEX. 



sity, i. 239; 'Life of Daltou,' 246; 

 on Charles Bell, 292. 

 Heraclitus of Ephesns, i. 314 ; the 

 "kinetic theory," 385 ; conception of 

 eternal motion, ii. 3 ; conception of 

 changing world-periods, 286. 

 Herapath, "mechanical theory of 



gases," i. 310; 434. 

 Herbart repudiated by Lotze, i. 49 ; 

 208 ; educational influence of, in 

 Germany, 257 ; phrenology, ii. 478 ; 

 anticipated Helmholtz, 491 ; influ- 

 ence of his philosophy, 494 ; on 

 "faculty -psychology," 495; psycho- 

 logical research, 496 ; mathematical 

 psychology, 498 ; 500 ; psychical 

 mechanism of, 504 ; space percep- 

 tion, 506 ; 507, 512, 515 ; introspec- 

 tive method, 527; " Volkerpsych- 

 ologie" and " Sprachwissenschaft," 

 530. 

 Herbert, Dean, natural selection, ii. 



330. 

 Herder, i. 50 ; History of Humanity, 

 51; 'Ideen,'53; ' Metakritik,' 83 ; 

 indebtedness to Gibbon, 169 ; 171 ; 

 cited on Georg Forster, 179 ; scien- 

 tific ideal of, 211 ; 212 ; Alcaic and 

 Sapphic metres, 213 ; educational 

 influence of, in Germany, 257 ; 258 ; 

 scientific work of, ii. 210 ; influence 

 of, 225 ; 280 ; philosophy of, 346 ; 

 psycho-physical view of nature, 531 ; 

 quoted, 533 ; 'History of Mankind,' 

 534 ; 538, 563. 

 Heredity, problem of, ii. 343, 613. 

 Hering, ii. 442 ; ' Ueber das Gedacht- 

 niss als eine allgemeine Funktion der 

 organischen Materie,' 544. 

 Hermann, Gottfried, indebtedness to 

 Bentley, i. 169; 162, 172; science 

 for its own sake, 211 ; 212, 214 ; 

 classical learning of, 222. 

 Hermann, Jac, Leibniz's letter to, 



quoted, ii. 646. 

 Hermite, researches of, ii. 124 ; 649 ; 

 on determinants, 683 ; on transcend- 

 ent numbers, 731. 

 Herodotus referred to on division of 



History into centuries, i. 13 ; 296. 

 Herrmann, Cr., quoted, ii. 266. 

 Herschel, Caroline, discovers her eight 



comets, i. 229 ; 285. 

 Herschel, Sir John, i. 177 ; quoted on 

 Laplace, 123; astronomical work of, 

 230 ; introduction of knowledge of 

 Continental mathematics to Cam- 

 bridge by, 233 ; science in England, 

 234 ; 236 ; and Airy, article in ' En- 



cyclopedia Metropolitana,' 236 ; 

 quoted on Fresnel, 241 ; educational 

 movement jjromoted by, 261 ; ' A 

 Preliminary Discourse on the Study 

 of Natural Philosophy,' 263, 306 ; 

 founded Anal}i;ical Society, 271 ; 

 spectrum analysis, 278 ; stands on 

 Bacon's philosophy, 307 ; 376 ; phe- 

 nomenon of fluorescence observed 

 by, ii. 52 ; criticism of the term 

 "potential energy," 140; 295; 'In- 

 troduction to the Study of Natural 

 Philosophy,' 328 ; experiments at the 

 Cape, 357 ; "sound," 488; theory of 

 probabilities, 569 ; 606. 

 Herschel, Sir William, ' On the Proper 

 Motion of the Sun and Solar System,' 

 i. 176 ; astronomical discoveries of, 

 229 ; 238, 285 ; discovery of Uranus, 

 324; 'Observations of Nebulaj,' ii. 

 283 ; nebular theorv, 295. 

 Hertwig, 0., 'The Cell,' ii. 224, 265, 

 297, 370, 371, 373, 420, 427, 444, 461 ; 

 embryological researches, 228 ; ' The 

 Biological Problem of To-day,' 298, 

 459 ; ' Zeit und Streitfragen zur Bi- 

 ologic,' 401 ; quoted, 409 ; ' The Cell,' 

 quoted, 425, 446, 448 ; " idioplasma, " 

 448 ; ' ' organicisme, " 455. 

 Hertz, H., electric theory, i. 344 ; elec- 

 trical wave-motion, ii. 77 ; electrical 

 view of light, 88, 92; "physical 

 mechanics," 101; electro - magnetic 

 wave-motion, 148 ; 193. 

 Hess, a founder of physical chemistry. 



ii. 152; 157. 

 Hesse, Otto, his elegant work, ii. 677 ; 

 introduces determinants, 682 et seq.; 

 and invariants, 684. 

 Hessel, ' Krystallometrie,' i. 443. 

 Hettner, history of the idea of humanity, 

 i. 50 ; literary history of the eigh- 

 teenth century, 59 ; cited on Georg 

 Forster, 179. 

 Heun, ' Jahresbericht der deutschen 



Mathematiker-Vereinigung,' ii. 101. 

 Heussler, Hans, on Bacon, i. 94. 

 Heyne of Gottingen University, i. 165 ; 



indebtedness to Bentley, 169. 

 Hicks, 'Report on Hydrodynamics,' ii. 

 58 ; contribution to vortex theorv. 

 63. ■" 



Higgins, theory of, i. 398. 

 Hilbert on algebraic numbers, ii. 729. 

 Hildebrand, Bruno, statistics, ii. 561. 

 Hillebrand, Karl, ' Zeiten, Volker, und 



Menschen,' quoted, i. 311. 

 Hippeau, C, ' Public Education during 

 the Revolution in France,' quoted, i. 



