446 



INDEX. 



Attraction, capillary, 109. 



, electrical, 275. 



, magnetic, 306. 



of electric currents, 319. 



Aurora, 289. 



Axis, lunar, 64. 



, major of planetary orbits inva- 

 riable, 19, 71. 



, connection of, with mean mo- 

 tion, 19. 



Axis of rotation, 7, 61. Notes 34, 137. 



, principal, 71. Note 142. 



parallel to itself, 61, 74. 



of the prism, 173. Note 199. 



of a telescope, 31. 



of a cone, 5. Note 22. 



, optic, 183. Note 202. 



of the earth's shadow, 39. 



Babbage, Mr., his theory of volcanic 

 action, 249. 



Bacon, 31. 



Back, Capt., cold suffered by, 241. 



Bailly, M., on the lunar tables of the 

 Indians, 83. 



Baily, Mr. Francis, on the form of 

 the earth, 49. 



Barlow, Mr., on terrestrial magne- 

 tism, 330. 



Barometer, 112. 



Barometrical measurements, 113. 



Base, trigonometrical, 46. Note 

 125. 



Batsha, tides at, 93. 



Battery, Voltaic, 291. 



Becquerel, M., his experiments and 

 opinions of electrical phenomena, 

 279. His theory of atmospheric 

 electricity, 281. His formation of 

 crystals, 297. His thermo-electric 

 battery, 328. 



Bessel, Professor, his notice of the 

 secular variation of the ecliptie,77. 



Biela, M., discovers a comet, 347. 



Binary systems of stars, 365. 



Bissextile, or leap-year, 80. 



Biot, M., his ascent in a balloon, 114. 

 His experiments on sound, 131. On 

 circular polarization, 184. His 

 theory of electrical light, 279. Of 

 terrestrial magnetism, 330. On the 

 disturbances of terrestrial mag- 

 netism, 332. His observations on 

 the magnetic force during his 

 aerostatic expedition, 334. 



Birds, their dispersion, 270. 



Bonnycastle, Capt., his account of a 



luminous appearance in the sa, 

 288. 



Bonpland, M., his botanical obser- 

 vations, 266. 



Botto, Professor, his experiments on 

 thermo-electricity, 328, 336. 



Bouguer, M., his mensuration of a 

 degree of the meridian at the equa- 

 tor, 47. 



Bradley, Dr., his discovery of nuta- 

 tion, 76. His tables of refraction, 

 149. He mentions the two stars 

 of y Virginis, 367. 



Brahmins employed the week of 

 seven days, 80. 



Brewster, Sir David, his discovery 

 of fluids in the cavities of mine- 

 rals, 96. His analysis of solar 

 light, 156. His law of the polar- 

 izing angle, 179. His investiga- 

 tion of the temperature of springs, 

 252. His es ti mate of the tern pera- 

 ture of the poles of maximum cold, 

 and of the poles of rotation, 260. On 

 the parallelism of the isothermal 

 and geothermal lines, ib. His ob- 

 servations on phosphorescence, 

 286. 



Brinkley, Bishop, his value of the 

 mass of the moon, 55. 



Brown, Mr., his botany of Australia, 

 266. 



Buchan, Dr., his account of a mi- 

 rage, 152. 



Burnes, Mr., his account of a volca- 

 nic elevation, 248. 



C. 



Caesar, Julius, his Calendar, 80. 

 Cagniard de la Tour, M., his inven- 



tion of the Syren, 138. 

 Callcott, Mrs., her account of the 



earthquake at Valparaiso, 248. 

 Caloric the cause of heat, 206. 

 -, the radiation of, 207, 220. 

 Calorific rays of the solar spectrum, 



206. 



- independent of light, 206 et 

 seq. 



- , transmission of the, 208 et seq. 



- , reflection and absorption of the, 

 213, 220. 



, refraction of, 213. 



, polarization of, 215. 

 Calotype, 194. 

 Capillary attraction, 108. 



- of tubes, 108. Notes 168, 169, 

 170. 



