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Rh *Moon, "First Men in," 3
 * Mountains in Moon, 184–187
 * Mount Whitney, 69, 70
 * Mount Wilson, 69, 97-99, 120–124, 221
 * Motor-car, 271
 * Murray, Sir James, 71


 * Nasmyth, James, 213, 218
 * Nasmyth and Carpenter, 185
 * Nautical Almanac, 186
 * Nebula in Cygnus, 256
 * Nebula, Great, in Andromeda, 113–115
 * Nebula round Nova Persei, 297
 * Nebula, Split.in Andromeda, 255
 * Nelson, Horatio, 62
 * Neon, 79
 * Neptune, 160–164, 180, 295
 * Newton, Sir Isaac, 12, 20–29, 34–37, 153, 278
 * New Zealand, Solar Observatory, 231
 * Nicholson, S. B., 180, 181
 * Nile floods, 142
 * Normans, 40
 * North Pole, 34
 * Nova Persei, 296–298


 * Object glass, 123
 * Obscuring patches, 252–257
 * Oil in alcohol and water, 174–175
 * Origin of planets, 170
 * Oxford, 27, 37, 65,71, 268, 292
 * Oxford Radcliffe Observatory, 183
 * Oxford University Observatory, 119
 * Pallas, 155
 * Pan, Peter, 31
 * Parabola, 35-38
 * Parallax (see distance)
 * Paris Observatory, 164
 * Parsons, Hon. C. A., 83, 96
 * Pasadena, 99, 127
 * Patience (operetta), 220
 * Pearson's Magazine, 47, 48
 * Pendulum, 29–31, 43, 44, 285, 290, 295
 * Perrine, C. D., 180, 181
 * Perturbations, 158–164, 202
 * Petrograd, 107
 * Phoebe, 177–182
 * Photography of Stars, 117, 118
 * Piazzi, 152, 154, 178
 * Pickering, W. H., 178
 * Pisa, 7–9, 26, 43
 * Pleiades, movements of, 279
 * Plumb-line, 33
 * Polarization of Corona, 244–248
 * Poles of Mars, 139, 145
 * Police, Astronomical, 152, 156
 * Pressure of Air, 64–71
 * Prism, 101, 129
 * Proctor, R. A., 280, 281
 * Prominences, 216, 217
 * Ptolemy, 267
 * Pulkovo, 107
 * Punch, 133
 * Puppets, 260, 261


 * Radium, 210, 211
 * Ramsay, Sir W., 79
 * Range-finder, 55
 * Rapid Stars, distances of, 269
 * Rayleigh, Lord, 72, 78
 * Reed, E. J., 133
 * Refraction, 99–102
 * Repsolds, 107
 * Retrograde Satellites, 180–182
 * Ribbons, coloured, 130
 * Riffelberg, 88
 * Roemer, O., 168, 169
 * Rosse, Lord, 96, 104, 115
 * Rotation, effects of, 170–177
 * Rotation of Earth, 29–34, 116
 * Rotation of Sun, 195–198, 228 230
 * Royal Astronomical Society, 21, 184
 * Royal Institution, 169
 * Royal Society, 26, 28
 * Russell, John, R.A., 183


 * St. Andrews, 296
 * St. John, C. E., 222, 224
 * San Francisco Earthquake, 108
 * Satellites, formation of, 175, 208