Goucher, 247 Gouy, 145 f. Grindley, 94 Hadamard, 88 Harrington, 94, 120 Helmholtz, 22, 23, 24 Hemsalech, 148, 161 Hertz, 17, 247 Hevesy, 225 Hogg, 94 Hughes, 245 Huygens, 233 Ishida, Y., 178 Jeans, 276 Joffé, 135 Joule, 7 Karpowicz, 171 Kelly, 136, 142 Klein, 255 Kelvin, Lord, 4, 23, 24 Konstantinowsky, 166 Kossel, 231 Kramers, 221 Ladenburg, 97, 98, 245 Lamb, 267 Langevin, 35, 134, 147, 268 f. Laplace, 46 Laue, 197 Lavoisier, 46 Lee, J. Y., 178 Lenard, 236, 251 Leucippus, 2 Lodge, Sir Oliver, 17, 46 Loeb, 37, 38 Lorentz, 21, 274 Lucretius, 2, 6 Lunn, 89 Lyman, 204, 210, 213 McLennan, 247 Marsden, 195, 196, 280 Maxwell, Clerk-, 8, 17, 19, 20, 24 77, 242, 275 Mendeleéff, 202 Meyer, 32, 135 f. Millikan, 57, 120, 129, 142, 150, 184, 203, 209, 214, 248, 254, 260, 261 (Fig. 36) Mohler, 247 Moseley, 196, 198, 200, 202, 203 204 f., 216 Nernst, 27 Newton, 211, 233, 256, 282 Nichols, 248 Nordlund, 157, 181 Ostwald, 10, 157 Paschen, 204, 210 Peltier, 20, 21 Perrin, 147, 170 Pierson, 136 Planck, 117, 212, 213, 237 f., 242, 244, 253 f., 261, 284 Plato, 9 Pohl, 166, 245 Prenin, 27 Pringsheim, 245 Prout, 205, 206 Przibram, 156, 166 Pythagoras, 4 Quincke, 52 Ramsay, 103 Rapp, 93, 94 Rayleigh, Lord, 252 Regener, 159, 160, 180 Richardson, 27, 245 Ritz, 210 [Pg 289] Ross, 258, 259 Rosseland, 255 Rowland, 185 Rutherford, Sir Ernest, 27, 33, 35, 50, 158, 159, 160, 180, 195, 209, 252, 277 Rydberg, 210, 282 Sadler, 199 Schidlof, 171 Schmid, 172 Schuster, Sir Arthur, 42 Siegbahn, 198, 200 Smoluchowski, 148, 154 Smythe, 259 f. Soddy, 147, 202 Sommerfeld, 211, 218, 220, 245 Spencer, 103 Stefan-Boltzmann, 117, 261 Stokes, 48, 90, 91, 97, 124, 267 Stoney, G. Johnstone, 21, 25, 26, 31 Sutherland, 86 Svedberg, 150 Symmer, 13 Tear, 248 Thales, 1, 6, 205 Thirion, 145 Thomson, Sir J. J., 14, 27, 33, 34, 42, 43, 49, 50, 51, 52, 53, 54, 55, 57, 58, 70, 143, 144, 186, 235, 237, 238, 248, 249, 253 Tomlinson, 94 Townsend, 36, 39, 40, 45, 46, 47, 50 f., 53, 54, 55, 58, 70, 125, 126f., 134, 265 f., 266 Tyndall, 8, 9 Varley, 24 Wahlin, 38 Warburg, 32 Watson, 259 f. Weber, 20, 21 Webster, 246 Weiss, 153, 156, 166 Wellish, 37 Westgren, 157, 181 Westphal, 38, 39, 40, 126 f., 134 Wien, 43, 117 Wilson, C. T. R., 48, 51, 52, 134 f., 138, 139 f., 141 Wilson, H. A., 52, 54, 55 f., 57, 63, 70, 161 f. Winchester, 209 Wood, 247 Zeeman, 43 Zeleny, 35 Zerner, 166 f., 168 ff. [Pg 290] INDEX OF SUBJECTS Absorption frequencies, 199 ff. Absorption spectra, 200 ff. Alpha particles: charge of, 158 f., 180; deflection of, 192; penetration by, 190, 194; range of, 190 Amperian current, 21