232 



COSMOS. 



Enceladus, a satellite of Saturn, 174. 

 Encke's Comet, elements, 197; its reap- 

 pearance, 198. 

 Epochs, main, of planetary discovery, 57. 

 Eccentricity of the planetary orbits, 127. 

 Exterior planets, 102. 



Fabricius first observes the solar spots, 64. 

 Faculae and shallows, 86. 

 Fage's Comet, elements, 197. 

 Falling stars, 204. 



Faraday on atmospheric magnetism, 84. 

 Fire-balls, 198. 



Flora, discovery of, 101 ; elements, 163. 

 Fontaney, the Jesuit, on the Magellanic 

 Clouds, 47. 



Galileo, his controversy with Marius, 16 ; 



his Mundus Jovialis, 17 ; use of colored 



glasses neglected by, 65. 

 Geminus mentions nebulous stars, 15. 

 Gnomons, ancient, 127. 



Halley's observations on nebulae, 19. 

 Halley's Comet, reappearances of, 186. 

 Heat, rays of, 83. 



Heat possessed by the Moon's light, 143. 

 Hebe, discovery of, 101 ; elements, 163. 

 Heis's observations on shooting stars, 212. 

 Herschel, Sir William, his estimate of the 

 extent of nebulous spots, 14; bis dis- 

 coveries, 21 ; on the nebula of Orion, 

 40; on solar spots, G7; opposed to the 

 assumption of a lunar atmosphere, 147. 

 Herschel, Sir John, on nebulae and stellar 

 clusters, 27, 31 ; on irregular nebulous 

 masses, 35 ; on the nebula in Orion, 38 ; 

 on the nebula round tj Argus, 41 ; on 

 the nebula in Vulpes, 41 ; his descrip- 

 tion of the Magellanic Clouds, 47 ; on 

 the black specks and coal-bags of the 

 southern hemisphere, 51 ; on the heat 

 of the Moon's surface, 131. 

 Herschel, Miss, discovery of a nebula by, 



31. 

 Hipparchus mentions nebulous stars, 15. 

 Houzeau's observations on the zodiacal 



light, 204. 

 Humboldt, Alexander von, works of, 

 quoted in various notes : 

 Asie Centrale, 222. 

 De Distributione Geograpbica Plan- 



tarum, 123. 

 Examen Critique de l'Histoire de la 

 Geographie du Nouveau Conti- 

 nent, 15, 28, 45, 151. 

 Kleinen Schriften, 114. 

 Voyage aux Regions Equinoxiales, 



215. 

 Vues des Cordilleres et Monumens 

 des Peuples Indigenes de l'Ame- 

 rique, 98. 

 Huygens discovers the nebula in the 



sword of Orion, 19, 37. 

 Hygeia, discovery of, 101 ; elements, 163. 

 Hyperion, a satellite of Saturn, 174. 



Intensity of the solar light on the planets, 



130. 

 Interior comets, 197. 



Interior planets, 103 

 Irene, discovery of, 101 ; elements, 163. 

 Iris, discovery of, 101 ; elements, 163. 

 Irregular nebulous masses, 33 ; situate 



near the Milky Way, 34 ; extraordinary 



size and singular forms, 36. 

 Isaac, Aben Sid Hassan, introduces the 



Latinized term nebulosaj into the Al- 



phonsine Tables, 15. 

 Jacob, Captain, on the nebula round 17 



Argus, 41. 

 Japetus, a satellite of Saturn, 174. 

 July, falling stars in, 214. 

 Juno, discovery of, 100; elements, 163. 

 Jupiter, numerical data, 165; streaks, or 



girdles, 167. 

 Jupiter's satellites, numerical data, 169. 



Kant's speculations on nebulae and star- 

 formation, 20. 



Kepler on planetary distances, 110 ; laws 

 of planetary motion discovered by, 229. 



Lacaille, his classification of nebulae, 19. 



Lambert's speculations on nebulae, 20. 



Lassell, discovery of a satellite of Saturn 

 by, 174; of satellites of Neptune by, 

 180. 



Laurentius stream of failing stars, 214. 



Le Gentil's study of nebulas, 20. 



Leonardo da Vinci. Earth-light known to, 

 145. 



Leverrier and Adams, claims to the dis- 

 covery of Neptune, 179. 



Lexell's Comet, 191. 



Light, time required to traverse the radius 

 of the Earth's orbit, 60; solar and arti- 

 ficial, 82 ; difference of intensity in the 

 different planets, 130. 



Light, zodiacal. See Zodiacal light. 

 I Light-clouds, comets so styled by the 



Greeks, 181. 

 I Lucerna Mundi, the Sun, 59. 

 J Lunar atmosphere disproved, 147. 

 i Lunar spots, 149. 



Magellanic Clouds, early notices of, 15; 

 termed Cape-clouds by the Portu- 

 guese, 43 ; general adoption of the 

 name, 46 ; described by Sir John Her- 

 schel, 48; not connected with one an- 

 other, 48; nor with the Milky Way, 48. 



Magnitude, absolute and apparent, of 

 planets, 105. 



Map of the Moon, 151. 



Mars, numerical data, 159 ; meteorologic- 

 al analogies with the Earth, 159. 



Masses of the planets, 1 18. 



May, falling stars in, 214. 



Mayer, of Gunzenhausen (Simon Marius), 

 first describes a nebula, 16. 



Mercury, distance, diameter, mass, densi- 

 ty of, 137. 



Messier, his discoveries regarding nebu- 

 lae, 21. 



Meteor asteroids, 57. 



Meteoric stones, 57 ; seldom fall from a 

 clear 6ky, 219 ; remarkable falls of, 

 219 ; analysis, 223. 



Metis, discovery of, 101 ; elements, 163. 



