CXV111 INDEX. 



On rain and supplementary rainbows, Note 203. On the constancy of tropi- 

 cal ocean temperatures, p. 296; Note 364. On the mean annual quantity of 

 rain in Paris, Note 405. 



Argelander, on comets, p. 102. On the proper motion of the solar system, p. 135. 

 138; Note 102. On the aurora, p. 181 ; Note 17.1. 



Aristarchus of Samos, his just cosmical views, p. 53. 



Aristotle, Physics, p. 45; Note 21. On comets, p. 96; Note 48. On the eleva- 

 tion of an island of eruption, Note 230. On the red colour of long-fallen snow, 

 p. 344 ; Note 424. 



Artesian wells, p. 162, 211 ; Notes 124, 138. See Springs. 



Atmosphere, general account of, p. 304-312; Notes 375-389. Its composition 

 and adventitious admixtures, p. 305307 ; Notes 375380. Humidity of the, 

 p. 308, 330333; Notes, 404408. Electricity of the, 308, 333-336; Notes 

 409418. Pressure of the, 307. See Barometer. 



Aurora, general account of, 179-189; Notes 169179. Description of, p. 180 

 182. Cases of coincidence in appearance of aurora and falling stars or meteors, 

 p. 115, 116. Editor's description of an aurora in Loch Scavig, Note 179. 



Aztec manuscript, supposed notice of zodiacal light, p. 129; Note 93. 



Babbage, on the influence of temperature in the elevation and subsidence of 

 strata, Note 348. 



Bacon, on physical similitudes in the configuration of the world, p. 282. 



Baer (Von), on the meteorology of the northern regions, Note 418. 



Barometer, variations of the, p. 307310; Notes 381388. Horary variations of 

 the, p. 308, 309. 



Barometric windrose, p. 310 ; Note 387. 



Batten (Mr.), letter on the limit of perpetual snow on the two declivities of the 

 Himalaya, Note 403. 



Beaufort (Captain), observed emissions of gas on the Caramanian coast, p. 210. 



Beaumont (Elie de), on the upheaval of mountain chains, p. 34, 291, 292; Note 

 357. On some of the geological causes of the influence exercised by the Alps 

 on pendulum experiments, Note 133. On the metamorphic action of primi- 

 tive rocks on secondary strata in the Tarantaise, p. 249 ; Note 272. 



Beccaria, on luminous clouds, p. 188. On lightning clouds without audible 

 thunder, p. 335. 



Beechey (Capt.), observations on sea temperatures and densities, Note 368. 



Beer (Wilhelm), on the distance between the planet Saturn and its nearest satel- 

 lite, p. 89. On the dimensions and mass of the Moon, Note 40. On the 

 libration of the Moon, Note 41. 



Belcher (Sir Edward), observation of magnetic disturbance at Macao, Note 143 

 (Editor). 



Bembo (Cardinal), on eruptions ot Etna, p. 218 ; Note 216. Supposed theory of 

 ditto, Note 234. On the zones of vegetation on the acclivities of Etna, p. 346 ; 

 Note 429. 



Benzenberg, on the velocity of the movements of aerolites, p. 112. On the perio- 

 dic return of the August meteors or aerolites, p. 115. 



Berzelius, on the chemical elements of meteoric masses, p. 120, 121 ; Note 84. 

 On the changes of level of the Swedish coast, Note 35. 



Bessel, on the theory of the oscillations of a pendulum in air, p. 26 ; Note 136 

 (Editor). Pendulum experiments with various substances, 51, 52. On the 

 parallax of 61 Cygni, p. 79, 103, 144 ; Note 34. On comets, p. 9496 , Notes 



