INDEX. 



483 



BEEHIVE. 



in the solar spectrum discovered, 

 216; cause of phosphorescence, 

 217 ; electricity excited by pres- 

 sure, 283 ; light attributed to elec- 

 tricity by, 284- ; cause of phospho- 

 rescence investigated, 296 ; in- 

 strument comparing intensities of 

 electricities invented, 300; crys- 

 tals formed by agency of electricity, 

 308 ; thermo-electric battery con- 

 structed by, 333 ; effect of atmo- 

 spheric on terrestrial magnetism 

 estimated, 345. 



Beehive, the, a nebulous star, 415. 



Berard, M., experiments of, in polar- 

 izing heat, 264. 



Berlin, line of coincidence in tempe- 

 rature passing through, 238. 



Berne, increasing temperature of a 

 deserted mine in, 230. 



Berre, Dr., photographic pictures per- 

 fected by, 205. 



Bessel, M., his calculations from mea- 

 surements of arcs of the meridian, 

 48 ; calculation of the sun's mean 

 apparent diameter, 56 ; his compu- 

 tation of the mass of Saturn's ring, 

 68 ; diminished obliquity of the 

 ecliptic observed by, 81 ; parallax 

 calculated, 389 ; his theory of 

 Sirius's irregular motions, 392 ; 

 catalogue of double stars, 396 ; 

 mass of 61 Cygni found by, 

 404. 



Beta Lyra?, a variable star, 391 ; ne- 

 bula between y Lyrse and, 410. 



Bezenberg, M., velocities of falling 

 stars computed by, 423. 



Biela, M., date of the discovery of 

 his comet, 367 ; possibility of col- 

 lision with the earth, 368 ; present 

 and prospective planetary influence 

 on, 369; becoming two distinct 

 bodies, 369, 370. 



Binary systems of stars, 395-406. 

 See Double stars. 



Biot, M., his ascent in a balloon, 118; 

 experiments of, on the transmission 

 of sounds through pipes, 137 ; 

 liquids possessing the power of 

 circular polarization discovered by, 

 190 ; his theory of circular polar- 



BREWSTER. 



ization, 191 ; cause of phospho- 

 rescence in the solar spectrum inves- 

 tigated by, 217. 



Birds, distribution of distinct species 

 of, 255. 



Birt, Mr., atmospheric waves mea- 

 sured by, 121, 122. 



Bise, in Switzerland, cause of, 242. 



Bismuth, its magnetic and electric 

 properties, 347. 



Black Sea, the, scarcely affected by 

 tides, 98. 



Bode, Baron, law of, assumed in com- 

 puting Neptune's position, 61 ; 

 failing in the case of Neptune, 63. 



Bond, Mr., satellite of Saturn dis- 

 covered by, 32 ; elliptical nebula 

 resolved, 413. 



Bonnycastle, Captain, phosphorescent 

 phenomenon observed by, 295, 296. 



Bonpland, M., identical productions 

 of the Old and New World found by, 

 251. 



Bootes, nebulous system in, 417. 



Bore, the, of the Hooghly, its origin, 

 94. 



Botanical districts, distinct, of the 

 globe, 251, 252. 



Botto, M., thermo-electricity used in 

 decomposition by, 333. 



Bouguer, degrees of the meridian mea- 

 sured by, 48. 



Boussingault, M., depth of the under- 

 ground stratum of constant heat 

 calculated by, 228. 



Bouvard, M., atmospheric undulations 

 estimated by, 121. 



Bradley, Dr., motion of the pole of 

 the equator discovered by, 84 ; his 

 tables of refraction, 155. 



Brahmins, measurement of time by, 

 85. 



Brand, M., observation of, on me- 

 teors, 423. 



Brewster, Sir David, his analysis of 

 the solar spectrum, 161 ; experi- 

 ments on rayless lines, 163 ; ex- 

 periments on spectra of flames, 

 164 ; law discovered by, deter- 

 mining angles of polarization for 

 light, 183 ; experiments on fluor- 

 escence of light, 197 : line of cqin- 

 Y 2 



