Mount Wilson Astronomical Observatory, 294, 362, 367 Mueller (glass-blower), 303, 304 Napoleon, 5-7 Nassau Hall, Princeton, 69, 72, 84, 87, 88, 99, 101, 103 National Academy of Sciences, 205, 272, 360, 366, 367, 369 National Institute of Social Sciences, 339, 348 National Research Council, 317, 366-383, 387 Naturalization, 136, 137 _Nature_, 192, 200, 201, 205, 206, 208, 221, 236 Nemanya, Zhupan, 10 “Neptune, Father,” 139-142 Nettleton, Mr. (of Norfolk), 327-329 New England Cracker Factory, 72-76, 78-95 New Physics, 349, 353-358 New York, landing in, 37-42 New York Academy of Sciences, 309 New York Mathematical Society, 352 New York Rapid Transit Commission, 289 Newton, 174, 177, 179, 180, 186, 193-196, 204, 210, 211, 221, 225, 282, 283, 296, 334, 381 Niagara Falls Power and Construction Company, 287, 288 Nikola (Serbian cigarette seller), 252-254, 258, 274-276 Niven, W. D., 143-146, 156, 171, 174-176, 178, 180, 181, 186, 197, 240 Norfolk, Conn., life at, 322-329 Nyegosh, Bishop (poet), 20, 68, 112 Octagon class, 119, 121 Oerstedt, 221, 224 Osborn, Henry Fairfield, 71 Oscillator, Hertzian, 265-270, 301, 302 Oxen herding in Idvor, 14-21, 301, 302, 333, 334 Palacky, 31-33 Panchevo, experiences in, 12, 20-24, 29, 31, 35, 154-156, 163, 312-318 Paris peace conference, 2, 312, 314, 315 Parkinson, Stephen, 182, 183 Parsons, William Barclay, 286 Pashitch, Premier, 312 Paul (of the cracker factory), 79, 80 Penn, William, 45, 57 Perrin, 349 Philadelphia, early experiences in, 56, 57 Phonograph, 299, 300 Physical Society, Berlin, 263-271 Physics, New and Electron, 349, 353-358 Pickernell, Mr., 335 Planck, 261, 277 _Plea for Pure Science, A_ (Rowland), 291 Plymouth Church, Brooklyn, 105-108, 129 _Poetry of Science, The_ (Hunt), 102 Poincaré, 257 Pornic, vacation in, 187-189 Power distribution, electrical, 289 _Practical Aspects of the Alternating Current Theory_ (Pupin), lecture, 283, 284 Prague, experiences in, 21-35, 163, 164, 248 Preceptorial system in college, 326 Princeton University, 69-72, 84, 87, 101, 143, 272, 316, 326 Privilegia (document), 4, 5, 9 Problems of physical universe, 354 Prussians, 247-255. _See also_ Germans Pupin coil, 335-342, 345 Pupin, Constantine (father of author), 2, 21-23, 34, 158 Pupin, Mrs. Michael, 276-278, 292, 310, 322, 330-332 Pupin, Olympiada (mother of author), 2, 10-12, 22, 23, 34, 157-160, 168, 169, 190, 191, 215, 242-246, 249-251, 255 Pyne, Moses Taylor, 69 Radichevich, Branko, 154 Radio, 295-299, 303, 342, 343, 357, 358 Radioactivity, 350, 351, 381 Radium, 350 Rayleigh, Lord, 144, 175, 176, 181, 184, 197, 213, 240, 330, 352 Regnault, 182 Relativity theories, 355 Research, progress of America in, 279-384 Resonance, 295-299 Resonators, electrical, 295-301 Reymond, DuBois, 258, 263