But beyond the fact that he must work hard, it would seem as though there were little of value to tell the would-be discoverer. The situation has been well summarised by Jevons in his chapter on Induction in the “Principles of Science;” and his words will form a fitting conclusion to these chapters:—

“It would seem as if the mind of the great discoverer must combine contradictory attributes. He must be fertile in theories and hypotheses, and yet full of facts and precise results of experience. He must entertain the feeblest analogies, and the merest guesses at truth, and yet he must hold them as worthless till they are verified in experiment. When there are any grounds of probability he must hold tenaciously to an old opinion, and yet he must be prepared at any moment to relinquish it when a clearly contradictory fact is encountered.”

INDEX

Aberration, [105-109], [111], [112], [117], [118], [185], [188], [192], [214], [215]
Accidental discovery, [15], [73], [121-154]
Adams, [12], [45-85];
resolution, [55]
Airy, [32], [40-85], [214]
Algiers, [130]
Alleghenia, [26]
Almucantar, [180], [181]
Alphabet used for planets, [27]
Anderson, Dr. T. C., [8], [142], [143], [144], [146]
Anthelm, [142]
Apollo, [9]
Argon, [109]
Ascension, [34]
Assumption, forgotten, [196]
Astræa, [22], [23], [219]
Astrographic chart, [122], [125], [130]
Astronomical Journal, [177-217]
Astronomische Nachrichten, [52], [158]
Astrophil, [143]
Auwers, [142]
Ball, Sir R., [24]
Balliol College, [87]
Banks, Sir J., [9]
Barnard, E. E., [146], [220]
Berlin, [181], [183], [184], [188], [193]
Berlin star-map, [45], [66], [83], [124]
Bessel, [192]
Bettina, [26], [27]
Birmingham, [142]
“Black Drop” (in transit of Venus), [30]
Bliss, [114]
Board of Visitors of Greenwich Observatory, [63]
Bode, [11], [14], [15], [22]
Bode’s Law, [12], [13], [38], [43], [45], [52], [72], [76], [77], [84]
Bourdeaux, [130]
Bouvard, [39], [40], [42], [48], [49], [50], [61]
Bradley, [39], [86-120], [188-192], [213], [214], [218], [219]
Bradley, John, [115]
Bremen, [20]
Bridstow, [87], [88], [94]
Briggs, [119]
Brinkley, [192]
British Association, [63]
Brünnow, [193]
California, [26]
Cambridge (Mass.), [180], [184], [188]
Cambridge Observatory, [23], [42], [49], [52], [63], [65], [66], [135], [193]
Cambridge University, [68-71], [114]
Cape Observatory, [123], [124], [130]
Cards, [11]
Cassini II., [156]
Catania, [130]
Ceres, [14-22]
Chacornac, [124]
Challis, [49-54], [63-68], [71], [85], [218]

Chandler, S. C., [118], [177-217]
Chapman’s “Homer,” [2]
Chicago, [157]
Chromosphere, [170]
Clarke, C. C., [2]
Coelostat, [94]
Columbus, [63]
Comet, [4-8], [88], [108], [117], [123], [125]
Commission, planetary, [27]
Common, A. A., [124], [127]
Compte Rendu, [62]
Comstock, [202]
Conference, Astrographic, [125-136]
Copernicus, [79], [95]
Cordoba, [130], [199]
Cornu, [210-213]
Corona, [170-175]
Cosmos (Humboldt’s), [160]
Delambre, [157]
Deviation of Pole, [187]
Disc of Neptune, [44], [64], [79]
Disc of Uranus, [4-7]
Dorpat, [192]
Doublet (photographic), [127-129]
Draconis, γ, [96-104]
Draconis, β, [193]
Driessen, [23]
Dry plate, [122]
Dublin, [192]
Earthquakes, [215]
Earth’s Pole, [177-217]
Eccentricity, [41], [83]
Eclipses, [170-176]
Edinburgh, [143]
Eduarda, [26]
Egeria, [22]
Endymion, [25]
Eriphyla, [26]
Eros, [25], [26], [28], [35], [37], [68]
Eulerian, [200], [209]
Evelyn, [26]
Exposure, times of, [122], [131]
Faculæ, [170]
Faraday, [201]
Flamsteed, [39], [53], [115]
Fleming, Mrs., [142]
Flora, [22]
Foulkes, Martin, [94]
French Academy, [43], [51], [62]
Galileo, [95], [163]
Galle, [44], [45], [47], [66], [67], [83]
Gasparis, [22]
Gauge (railways), [56]
Gauss, [17-20]
Geminorum, H., [4]
George III., [8], [10]
“Georgian,” [11]
Georgium Sidus, [8], [10], [11]
Gill, Sir D., [32], [34], [35], [123]
Gilliss, [32]
Gotha, [20]
Gould, [32]
Graham, [22], [23]
Gravitation, law of, [38], [45], [59], [84], [105]
Greaves, [119]
Greenwich Observatory, [48-64], [88], [89], [114-117], [130], [160-169], [182], [192], [193], [206], [213]
Gregory, [93], [119]
Hale, G. E., [170], [171]
Hall, A., [184], [185]
Halley, [88-92], [108], [112-116], [119]
Hansen, [41], [59]
Harkness, [184]
Hartwig, [142]
Harvard College Observatory, [128], [142], [144], [145]
Hebe, [22]
Hegel, [15]
Heidelberg, [145]
Heliometer, [32], [34]

Helium, [109]
Helsingfors, [130]
Hencke, [22], [23], [64], [153], [219]
Henry brothers, [124-129]
Herschel, Sir John, [63], [75], [83]
Herschel, Sir William, [2-11], [39], [44], [82], [219]
Herschel (Uranus), [11], [12]
Hind, [22], [23], [25], [142]
Hooke, [96], [97]
Hubbard, [184]
Humboldt, [160]
Hussey, Rev. T. J., [40], [42]
Hygeia, [22]
Ilmata, [26]
Industria, [26]
Ingeborg, [26]
Instruments at Greenwich, [114-116]
Iris, [22], [23], [32], [35]
Janson, [142]
Jevons, [219]
Johnson, M., [156], [160]
Juno, [9], [21], [22]
Jupiter, [9], [28], [43], [49], [50], [61];
satellites, [92], [117]
Keats, [1-3], [7], [8]
Keill, [94], [112], [119], [156]
Kelvin, Lord, [196], [197]
Kepler, [95], [142]
Kew, [95], [96], [188], [190]
Kiel, [141]
Kimura, [216]
Königsberg, [192]
Küstner, [118], [181], [183]
Lalande, [7], [11], [107], [157]
Lameia, [26]
Laplace, [61]
La Plata, [130]
Latitude variation, [99], [100], [117], [118], [177-217]
Lemonnier, [39], [53], [157]
Le Verrier, [12], [43-85]
Libussa, [26]
Lick Observatory, [152]
Liouville’s Journal, [73]
Lisbon, longitude of, [92]
London, [23], [25], [96]
Long, [157]
Longitude, [92], [117]
Lowth, Bishop, [119]
Lyrae, α, [184], [196]
Macclesfield, Earl of, [94], [113]
Mädler, [192]
Magnetic observations, [161], [164], [174]
Magnitude equation, [135]
Markree, [23]
Mars, [9], [28], [32], [34], [35], [91]
Mayer, [39]
Measurement of plates, [132-135]
Mécanique Céleste, [61]
Melbourne, [130], [193]
Memorandum (Adams), [55]
Mercury, [9]
Messier, [7]
Meteorites, [59]
Meteors (November), [60]
Metis, [22], [23]
Micrometer, [5], [133]
Milky Way, [125]
Minerva, [9]
Minor planets, [13-28]
Minor planets tables, [22], [24], [26]
Mistakes, [71-83]
Molyneux, Samuel, [94-96], [101], [104]
Monte Video, [130]
Moon, tables of, [117]
Names of minor planets, [22-28]
Nasmyth, [162]
“Nautical Almanac,” [11]
Nebula, [124], [146-152]

Neptune, [11], [12], [38-85], [124]
New College Lane, [112]
Newcomb, Simon, [81], [183], [184], [195-202], [207], [208]
New stars, [121], [140-154]
Newton, [38], [84], [90-95], [105], [113]
New York, longitude, [92]
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]
Ward, [119]
Washington Observatory, [184-188], [193], [196], [213]
Weather and sun-spots, [161], [167-169]
Weyer, [193]
Whiteside, [112]
Williams, Mrs. E., [110], [111]
Wind-vane, revolutions, [167-169]
Winnecke, [32]
Wolf, Dr. Max, [145]
Wolf, Rudolf, [163]
Wren, Sir C., [119]
Yerkes Observatory, [145], [146], [152], [157], [170], [176]
Zeiss, [154]
Zodiac, [64], [124], [137]

THE END

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