INDEX. 



777 



108 ; 109 ; quotes Condorcet, 111 ; 

 'L'Instruction publique en France 

 pendant la Revolution,' 259. 



Hippocrates, ii. 470. 



Hirn, the steam-engine, i. 331, ii. 133 ; 

 indestructibility of force, 111 ; con- 

 troversy with Zeuner, 135 ; 179. 



Hirsch, Dr A. , ' Gesch. d. medicinischen 

 Wissenschaften in Deutschland,' i. 

 210, ii. 390, 401. 



Hirzel, Sal., i. 167. 



His, W., ii. 271. 



Histology, Huxley on, i. 196. 



Historians, supposed objectivity of, i. 

 7. 



Historical geography, i. 294. 



History, contemporary, to what extent 

 possible and valuable, i. 6 ; Goethe 

 quoted on re-writing of, 7 ; periods 

 of, 13 ; philosophy of, due to Con- 

 tinental thinkers, 25 ; periods of, 

 take their name from some great 

 event or movement, 58 ; and science, 

 relations of, 206. 



Hittorf, W., on attraction in chemical 

 phenomena, i. 380 ; fellow - worker 

 with Pliicker, ii. 76 ; electrolysis, 

 164 ; vacuum-tube experiments, 190. 



Hobbes, philosophy of, i. 48 ; ' De Cor- 

 pore ' quoted on Harvey, 282 ; 385, ii. 

 473. 



Hobson, on the infinite, ii. 736. 



Hoff, Prof, van't, i. 431, 450 ; 'Journal 

 fiir physicalische Chemie,' ii. 158; 

 (see Ostwald), 159 ; researches of, 

 164 ; discovery of, 165 ; carbon tetra- 

 hedron of, 424. 



Hoifmann, F., animist, i. 126. 



Hofmann, A. W. von, on Liebig, i. 18, 

 188 ; scientific experiments under, 92 ; 

 chemical researches of, 412; "Fara- 

 day " lecture, ii. 391 ; 393. 



Hofmeister, Wilhelm, the genetic con- 

 ception of plant life, ii. 224 ; induc- 

 tive school of, 321. 



Hogg, 'The Microscope,' ii. 228. 



Holbach, ' Systeine de la Nature,' i. 

 144. 



Holger, von (see Baumgartner), ii. 107. 



Holman, Prof. S. W., ' Matter, Energy, 

 Force, and Work,' ii. 182. 



Holtzmann, investigations into nature 

 of heat, ii. 112 ; and Clausius, 135. 



Holtzmiiller on isogonal relations, ii. 

 701. 



Homer, i. 261, 296. 



Homoeopathy, i. 210. 



Homogeneous formulae, ii. 681 ; co- 

 ordinates, Mobius, 681. 



Homology, study of, ii. 258; in geo- 

 metry, 663. 



Hooke, Dr Robert, "reciprocal dupli- 

 cate " ratio, i. 98 ; used the term 

 " cell," 195 ; 283, 434 ; referred to by 

 Young, ii. 18 ; theory of elasticity, 

 30 ; compound microscope, 228. 



Hooker, Sir J. D. (see Darwin), ii. 329 ; 

 Darwin to, 406. 



Hopital, Marquis de 1', adopted the 

 calculus, i. 101. 



' Horen ' of Schiller, i. 84. 



Horner, 'Edinburgh Review,' i. 273. 



Horsley, edition of "Newton's Works," 

 i. 355. 



Horstmann, labours of, ii. 170 ; free 

 energy, 173. 



Houe'l referred to, ii. 653 ; on non- 

 Euclidean geometry, 714. 



Hovelacque, Abel, ' La Linguistique,' 

 ii. 540. 



Howard, Luke, classification of clouds, 

 i. 286. 



Huber, investigations of, ii. 415. 



Huggins, Sir William, light, ii. 11. 



Hugo, Prof., of Gb'ttingen, translated 

 44th chapter of Gibbon's 'Roman 

 Empire,' i. 169. 



Humboldt, A. von, on scientific state 

 of Paris at the close of the eighteenth 

 century, i. 17; ' Kosmos,' 51, 53, ii. 

 277, 284, 328, 329, 532 ; ' Life ' by 

 Bruhns, i. 207, 253, 263 ; travels in 

 America, i. 83 ; eminence in scien- 

 tific literature of, 105 ; his influence 

 as populariser of the study of natural 

 history, 106 ; 133, 155 ; and Gauss's 

 scheme for a network of magnetic 

 observations, 167 ; 171, 175, 176 ; 

 uninfluenced by speculative spirit in 

 German science, 178 ; cited on Georg 

 Forster, 179; 183, 190; supported 

 scientific institutions at Berlin, 238 ; 

 Bell's theorem, 293 ; founded, with 

 Oken, " Naturforscher - Versamm - 

 lung," 298 ; and Gay-Lussac, 425 ; 

 popular work of, ii. 149 ; explorations, 

 206; travels, 222, 247; morphology, 

 225, 226 ; 252 ; extension of mor- 

 phological view, 260 ; and Robert 

 Brown, 265 ; 266 ; influence of, 276 ; 

 293, 300; 341, 390, 467; animal 

 electricity, 475, 476 ; 514, 607. 



Humboldt, W. von, creator of Berlin 

 University, i. 38 ; 203, 206, 212, 253, 

 263 ; comparative philology, ii. 538 : 

 542. 



Hume, David, transition from the logi- 

 cal to the historical view, i. 46 ; 



