INDEX. clix 



p. 4950 and xviii. xx. (Notes 104105.) Intensity of, of stars, see " Pho- 

 tometry" and "Scintillation.'' Of the Sun, of its centre, of its edges, and 

 of its spots, p. xxxvii. (Note 162), 285288 and ciii. civ. (Notes 484-486.) 

 Diminutions or obscurations of the, of the Sun recorded by annalists, p. 282 

 283 and xcviii. cii. (Note 481.) Strength of the Sun's, on the different 

 planets, p. 337338. ZodL.cal, see " Zodiacal." 



Magellanic clouds, p. 218-219, 246254, and xci. (Note 445.) 



Magnetism, its relation with light, heat, and electricity ; and whether terrestrial 

 magnetism is connected with an annual period, p. 3536, and 289 290. 

 Paramagnetic properties of oxygen, p. 289- 90. 



Maps, star, p. 9899. 



Mars, great ellipticity of, as compared with its period of rotation, p. 310. Special 

 notice of, p. 369371. Variation of its surface with change of season, 

 p. 370371. 



Mercury, p. 346348 and cxxiv. cxxv. (Notes 555 and 556.) 



Meteors, see " Aerolites" and " Fireballs." 



Micrometers, and other measuring instruments, first introduction of, p. 4+, 59, 

 63, and xiv. (Notes 9192.) 



Middle ages, views of natural philosophy in the, p. 1617. 



Milky Way, p. 124131, xiii. (Note 81), Ixiv. Ixvi. (Notes 245265.) 



Moon, p. 351 368 and cxxvi cxxxiii. Numerical data, p. 351 352. Reflected 

 solar light from, p. 352353. Reflected solar heat from, p. 353354. Earth- 

 light on the, p. 354355. Eclipses of the, p. 355357. Occultation of stars 

 by the, p. 357358. Character of surface and mountains, &c. of the, p. 359 

 367. Absence of water, and consequences thereof, p. 367 368. Effects of 

 the, on the Earth, p. 368. 



Motion, proper, of fixed stars, p. 178185. Of solar system, p. 193198. 



Music of the spheres, p. 315317, and cxv. (Note 511.) 



Nebula in Orion, p. 220 222; 240243. In Andromeda, p. 122-123, 219222, 

 and Ixxxv. (Note 403.) Around rj Argus, p. 243 244. In Sagittarius, p. 244. 

 In Cygnus, p. 244. In Vulpes, p. 244. Spiral nebula in Canis Venaticus, 

 p. 245246. 



Nebulae, p. 215258, and Ixxviii. xcii. (Notes, 358 459.) "Whether all are remote 

 ' and very dense clusters of stars? p. 215216, and Ixxx. Ixxxi. (Notes 382 and 

 383.) Historical account of our knowledge of, 217229, and Ixxxiii. Ixxxv . 

 (Note 401.) Simon Marius, and Galileo on, p. 219 221. Huygens, Halley, 

 Cassini, Lacaille, and Messier on, p. 221223, and 224. William and John 

 Herschel on, p. 224225. The Earl of Rosse on, p. 225226. Number, posi- 

 tions, and distribution of, p. 229 233, and Ixxxii. Ixxxiii. (Notes 392, 393, and 

 398.) Symmetrical forms of, round, annular, spiral, &c. p. 233 238; amor- 

 phous or irregular, p. 238 243, and 246. 



Nebular hypothesis, p. 217, 226229. Kant and Lambert on, p. 223. 



Neptune, p. 390392. Note respecting discovery of, p. cxxxix. Satellites of, p. 

 392393. 



New stars, see Stars. 



Newton, doctrine of gravitation, p. 21 23, and vii. viii. (Notes 40 43.) 



Parallax of stars, p. 185192. Method of determining the parallax of double 



stars, p. 191192, and 454. Of 61 Cygni, p. Ixxii. (Notes 308310.) 

 Photometry, p. 7885, and xxxvi. xxxix. (Notes 156166), and xl. xlv. 



