Dubois-Reymond, 44, 58 _note_, 253 Duclaux, 119, 137, 184, 324 Dufour, 297 Duguet, 264 Duhem, 62, 264, 265 Dulong, 126 Dumas, 115, 149, 151-2 Epicurus, 35, 146 Ehrlich, 176 Errera, 52, 193-4, 237, 153, 295, 302 _et seq._ Euclid, v. Faye, 260 Feuchterslehen, 358 Flemming, 161 Flourens, 20-1, 152, 208, 306, 358 Fouillée, 242 Fromann, 161 Fuerth, 183 Galen, 25, 55, 143 Galeotti, 180 Galileo, 73, 91, 98, 197, 241, 260 Gardair, 19, 248 Gautier, A., 3, 32, 36, 39, 176, 233, 324 Gernez, 237, 288, 295 _et seq._ Glisson, 27 Goethe, 170, 312 Gouy, 266, 268 Grimaud, 19 Gruber, 165, 206, 257 Guignard, 161 Guillaume, 237, 262, 264, 271, 277 Guillemin, 237 Guldberg, 83 Harbermann, 183 Haeckel, 3, 46, 164, 167, 246, 251 Hales, 43 Haller, 27 Hamilton, Sir W. Rowan, 67 Hammarsten, 180 Hartmann, 276, 346 Harvey, 43, 160 Haüy, 282 Hegel, 170, 331 Heidenhain, 3, 29, 30-1 Heitzmann, 161 Helmholtz, 44, 56, 58, 67, 90, 97, 99, 252 Helmont, van, 3, 21, 26, 33, 146, 250 Henninger, 302 Heraclitus, 34 Hertwig, 167 Hertz, 88 Hess, 91, 98 Hippocrates, 146 Hirn, 126 His, 46 Hlasitwetz, 183 Holbach, d’, 354 Hoogewerf, 303 Hopkinson, 271 Humboldt, W. von, 354 Ingenhousz, 115 Izolet, 247 Joule, 53 _note_, 90-1, 93, 133 _et seq._, 143, 152 Kant, 312, 319 Kaup, 213 Kaufmann, 126 Kelvin, Lord, 63, 67, 90, 92, 251-2, 264; and the idea of energy, 66 Kepler, 29, 241 Klemm, 323 Koelliker, 160 Kossel, 174, 179, 130-1, 136 _et seq._ Kuhne, 45 Kuhm, 216 Kuliabko, 23, 311 Kunstler, 157, 161-2, 175 Kuppfer, 161 Lammettrie, 147 Lamarck, 46 Lapparent, 284 Lapicque, 140, 145 Langley, 216 Laplace, 43, 63, 126, 260 Laulanié, 103 Laurie, 271 La Rochefoucauld, 356 Lavoisier, 3, 28, 30, 36, 43, 65, 117, 121, 126, 128, 143, 176, 296 Lea, 216 Le Châtelier, 85, 92 Lechatelier, H. and A., 271 Lecocq de Boisbaudran, 295 Leeuwenhoek, 232 Lefèvre, 126 Legallois, 21 Leydig, 161-2 Liebermeister, 136 Liebig, 26, 53 _note_, 117 Lilienfeld, 179, 247 Locke, 23 Lodge, 271 Loeb, 43, 167, 327, 341 Loew, 324 Loisel, 339, 341 Lorry, 21 Longet, 52 Lowitz, 297 Loye, 192 Ludwig, 44, 215 Mach, 41, 62 Magendie, 43, 143 Magy, 37 Malgaigne, 153 Mallard, 284 Marinesco, 231, 328 Markel, 349 Maspero, 3, 234 Matthiesson, 271 Maupas, 337 Maxwell, 88 Mayer, R., 56, 58, 89, 90, 97, 99, 101 Mering, von, 133, 136 Metchnikoff, 327 _et seq._ Miescher, 174, 179 Milne-Edwards, 152, 195 Minot, 341 Miura, 137 Mori, 145 Müller, 20, 27, 341 Murato, 45 Naegeli, 168 Needham, 46 Newton, 58 _note_, 70, 90-1, 93 Noorden, van, 129, 137, 140, 210 Nussbaum, 165, 206, 215, 217 Obermeyer, 271 Osmond, 237, 271