Novæ, 180-182, 265, 267, 343 Nova Persei, 190 November transits of Mercury, 15 Number of nebulæ, 191 " of stars, 135, 136, 236, 237 " of variable stars, 182, 183 O Obliquity of ecliptic, 47 Occupations, 14, 15, 54, 67, 80, 84, 85, 259, 340, 341 Octans, 303 Odling, 122 Oeltzen, 72 Olbers, 104, 124 Old, 340 Orion, 49, 146, 273, 274 Osiris, 145, 259, 261, 283 "Ostriches," 266 Otawa, 240 Ovid, 242, 250, 255, 265, 288, 291, 322 P Palisa, 71 Palmer, 182 Parker, 19 Parkhurst, 174 Paschen, 2 Pastorff, 25 Pavo, 307 Payne, 139 Pearson, 77 Peary, 119 Peck, 176 Pegasus, 248 Pelion, 282 Peritheus, 258 Perrine, 15, 76, 191, 192, 214 Perrotin, 351 Perseus, 244 Petosiris, 222 Philostratus, 334 Phlegon, 332 Phœbe, 90 Phœnix, 301 Phosphorus, 17 Photographic nebula, 192 Pickering, E. C., 125, 140, 144, 177 Pickering, W. H., 1, 12, 51, 61, 95, 102 Pictor, 304 Pierce, 228 "Pilgrim Star," 180, 185, 186 Pingré, 54 Pinzon, 294 Pisces, 271 Piscis Australis, 295, 296 Planetary nebulæ, 213 Platina, 107 Pleiades, 19, 52, 137, 154, 157, 235, 254-257 Pliny, 17, 265, 280 Plummer, W. E., 180 Plurality of worlds, 328, 356, 357 Pococke, 271 Pogson, 317 Polarization of moon's surface, 52 Polarization on Mars, 61 Pole of cold, 33 " star, 138, 239, 240 Pollux, 257 Polydectus, 244 Poor, 15 (footnote) Poynting, 130 Præsape, 259 Prince, 25 Proclus, 221 Proctor, 7, 49, 59, 123, 285, 308, 323, 352 Procyon, 156, 157, 236, 284 Ptolemy, 189, 221-223, 224, 227, 230, 231, 234, 238, 244, 252, 253, 260, 263, 264, 267, 269, 275, 278, 281, 284, 293, 302, 330 Pyramid, Great, 46, 47, 308, 353 Pytheas, 46 Q Quadruple system, 168 Quénisset, 21, 133 R Rabourdin, 103 Radium, 7, 8, 38 Râhu, 93 Rama, 284, 340 _Rational Almanac_, 46 "Red Bird," 290 Red star, 279, 292 Regulus, 30, 156, 235, 236, 260, 310, 340 Remote galaxies, 193, 204, 205 Reticulum, 304 Rhea, 89 Rheita, De, 144 Riccioli, 189 Ricco, 32 Rigel, 156, 157, 222 Rigge, 107 Ring nebula in Lyra, 211 Rings of Saturn, 85 Rishis, 240 Ritter, 76, 147 "Rivers, celestial," 308 Roberts, Dr. A. W., 172, 173 Roberts, Dr. I., 95, 154, 200, 201, 203, 317 Roberts, C., 84 Robigalia, 280 Robinson, 342, 357 Rœdeckœr, 28 Rogovsky, 42, 43, 44, 75 Rosse, Lord, 76 Roszel, 70 Rotation of Mercury, 16 " of Uranus, 91 " of Venus, 22 Rubáiyát, 127 Rudaux, 80, 89 Russell, H. C., 21 Russell, H. N., 146 Russell, J. C., 333 Rutherford, 38 S Sadler, 78, 299 Safarik, 24, 25 Sagittarius, 265-267 _Sahu_, 274 Santini, 357 Satellite, eighth, of Jupiter, 82 " possible lunar, 54 " of Venus, 28, 29 Sawyer, 186 Sayce, 218, 261