servatory, 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

Phaetusa, 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

Reseau, 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

Tyc