Ninina, 26 Northleach, 87 Northumberland, 65 Nova Geminorum, 141, 145, 146 Nova Persei, 143, 146-152 Nutation, 99, 100, 110, 115, 117, 118, 188, 219 _Observatory_ (magazine), 26 Ocllo, 26 Olbers, 20-22 Olympic games, 119 Oriani, 15 Ornamenta, 26 Oxford University, 87-89, 94, 105-119 Oxford University Observatory, 121, 130, 132, 136, 142, 145, 154 Palermo, Observatory of, 18 Palisa, 26 Pallas, 9, 21, 22 Parallax, 34, 91, 95-98, 109, 185 Paris, 130 Parkhurst, J. A., 145 Parthenope, 22 Peirce, 73, 80-83 Pendulum, 117 Perseus, 8, 143 Personal equation, 31, 134, 135, 185 Perth, 130 Perturbations of Uranus, 12, 42, 51, 54, 55, 61, 75 Peters, 188, 192 Phaëtusa, 26 Philosopher, 201, 219 _Philosophical Transactions_, 3, 4, 9 Photographica, 26 Photographic methods, 24, 33, 36, 121-139; lenses, 125, 126 Photographs of sun, 163, 170-173 Piazzi, 13-18, 22 Pickering, E. C., 128, 144 Pittsburghia, 26 Plana, 61 Planetary distances, 13; commission, 27; numbering, 27 Planets by photography, 24 Pole Star (_Polaris_), 177, 178, 192, 193 Pond, 192, 213 Potsdam, 130, 181 Pound, Mrs., 104, 110-112 Pound, Rev. James, 89-94, 104, 115 Prague, 181 Precession, 96, 178 Prymno, 26 Puiseux, 32 Pulfrich, 154 Pulkowa, 181-188, 213 Quadrants at Greenwich, 116 Radium, 175 Radius vector, 52-58, 60-62, 79, 83 Rayleigh, Lord, 109 Records before discovery, 144 Reflector, 93, 127, 128 Reflex zenith tube, 192, 214 Refraction, 96, 101-103, 117 Refractor, 93, 128 Réseau, 133 Residual phenomena, 108-110, 118, 120, 218 Rigaud, S. P., 87, 115, 119 Rome, 130 Rothschild, 27 Royal Astronomical Society, 40, 47, 68, 74, 124, 155, 157 Royal Society, 4, 9, 10, 92, 94 Sampson, R. A., 74-76, 84 San Fernando, 130 Santiago, 130 Sappho, 32, 35 Saturn, 9, 43, 61, 149, 150 Savile, Sir H., 119 Savilian professorship, 87-94, 108-119 Schmidt, Julius, 142, 160 Schuster, A., 169 Schwabe, 155-163, 176, 177 Sheldonian Theatre, 119 Sherbourn, 87 Solar eclipse, 26, 170-176 Spectro-heliograph, 170, 171 Star-maps, 45, 65, 83, 124 "Star-trap," 24 Stereo-comparator, 154 Stone, E. J., 32 Struve, 184, 188, 192 Sun's distance, 28-37 Sun-spots, 155-176 Sydney Observatory, 130 Tacubaya Observatory, 130 Telescopes, 92, 124-129 Thames River, 105 Themistocles, 119 _Theoria Motus_, 17 Theory and observation, 208 Thomson, Sir W., 196, 197 Tides, 215 Titius, 13 Toulouse Observatory, 130 Tycho Brahé, 95, 140, 142 Uranus, 2-14, 25, 38-85, 144, 219 Variable stars, 140 Variation of latitude, 99, 100, 117, 118, 177-217 Venus, 9, 79; diameter of, 92; transit of, 28-32, 34 Vesta, 21, 22 Victoria, 22, 25, 32, 35 Von Zach, 20 Wallace, 119 Wansted, 88-94, 104, 110, 115, 188, 190