C 2 ] 



Argelander, on the comet of 1811, 95; 

 on the motion of the solar system, 

 136, 139 ; on the light of the Aurora, 

 189, 190. 



Aristarchus of Samos, the pioneer of 

 the Copernican system, 47. 



Aristotle, 47 ; his definition of Cosmos, 

 51; use of the term history, 55; on 

 comets, 88, 89; on the Ligyan field 

 of stones, 102; aerolites, 110; on the 

 stone of ^Egos Potamos, 123; aware 

 that noises sometimes existed without 

 earthquakes, 205 ; his account of the 

 upheavals of islands of eruption, 240; 

 ' spontaneous motion,' 349 ; noticed 

 the redness assumed by long-fallen 

 snow, 353. 



Artesian wells, temperature of, 166, 

 220. 



Astronomy, results of, 18 20 ; pheno- 

 mena of physical astronomy, 23, 

 24. 



Atmosphere, the, general description 

 of, 317 322; its composition and 

 admixture, 317, 318; variation of 

 pressure, 319 323; climatic distri- 

 bution of heat, 319, 323335; dis- 

 tribution of humidity, 319, 335, 

 342; electric condition, 319,342 

 346. 



August, his psychrometer, 340, 341. 



Augustine, St., his views on sponta- 

 neous generation, 354, 355. 



Aurora Borealis, general description 

 of, 187 197; origin and course, 

 ]89191; altitude, 193, 194; bril- 

 liancy coincident with the fall of 

 shooting stars, 114, 115; whether 

 attended with crackling sound, 194, 

 195; intensity of its light, 196. 



Bicon, Lord, 34, 40; Novum Organon, 



294. 



Baer, Von, 345. 

 Barometer, the, increase of its height, 



attended by a depression of the level 



of the sea^ 303; horary oscillations 



of, 320, 321. 

 JBatten, Mr., letter, on the snow line of 



the two sides of the Himalayas, 339, 



340. 

 Beaufort, Capt, observed the emissions 



of inflammable gas, on the Carama- 



nian coast, as described by Pliny, 



220. See also note by Translator, 

 220. 



Beaumont, Elie de, on the uplifting of 

 mountain chains, 31, 304, 305; in- 

 fluence of the rocks of Melaphyre 

 and Serpentine, in the southern de- 

 clivities of the Alps, on pendulum 

 experiments, 159; conjectures Dn 

 the quartz strata of the Col de la 

 Poissoniere, 267. 



Beccaria, observation of steady lumi- 

 nous appearance in the clouds, 197 ; 

 of lightning clouds, unaccompanied 

 by thunder or indications of storm, 

 345. 



Beechey, Capt., 82; observations on 

 the temperature and density of the 

 water of the ocean, under different 

 zones of longitude and latitude, 

 311. 



Bembo, Cardinal, his observations on 

 the eruptions of Mount Etna, 227 ; 

 theory of the necessity of the proxi- 

 mity of volcanoes to the sea, 242; 

 vegetation on the declivity of Etna, 

 356. 



Berard, Capt, shooting stars, 107. 



Bertou, Count, his barometrical mea- 

 surements of the Dead Sea, 301. 



Berzelius, on the chemical elements of 

 aerolites, 118120. 



Bergenberg, on meteors and shooting 

 stars, 106, 107; their periodic return 

 in August, 113. 



Bessel's theory on the oscillations of 

 the pendulum, 24; pendulum expe- 

 riments, 46; on the parallax of 61 

 Cygni, 72; on Halley's comet, 87, 

 88, 89, 90; on the ascent of .shooting 

 stars, 111 ; on their partial visibility, 

 116; velocity of the sun's translatory 

 motion, 135; mass of the star 61 

 Cygni, 138 ; parallaxes and distances 

 of fixed stars, 143; comparison of 

 measurements of degrees, 157. 



Biot, on the phenomenon of twilight, 

 104, 105 ; on the zodaical light, 131 ; 

 pendulum experiments at Bordeaux, 

 162. 



Biot, Edward, Chinese observations of 

 comets, 86, 95 ; of aerolites, 116. 



Bischof, on the interior heat of the 

 globe, 213,216, 234, 243, 299. 



Blumenbach, his classification of the 

 races of men, 365, 366. 



