INDEX. 



305 



Caille, La, pendulum measurements at 

 the Cape of Good Hope, 169. 



Caldas, quantity of rain at Santa F6 de 

 Bogota, 334. 



Caraargo's MS. Historia de Tlascala, 140. 



Capocci, his observations on periodic falls 

 of aerolites, 126. 



Carlini, geodesic experiments in Lombar- 

 dy, 168 ; Mount Cenis, 170. 



Carrara marble, 262, 263. 



Carus, his definition of "Nature," 41. 



Caspian Sea, its periodic rise and fall, 297. 



Cassini, Dominicus, on the zodiacal light, 

 139, 140; hypothesis on, 141; his dis- 

 covery of the spheroidal form of Jupi- 

 ter, 164. 



Cautley, Capt., and Dr. Falconer, discov- 

 ery of gigantic fossils in the Himalayas, 

 278. See, also, note by Translator, 278. 



Cavanilles, first entertained the idea of 

 seeing grass grow, 149. 



Cavendish, use of the torsion balance to 

 determine the mean density of the 

 Earth, 170. 



Challis, Professor, on the Aurora, March 

 19 and Oct. 24th, 1847, see note by 

 Translator, 195, 199. 



Chardin, noticed in Persia the famous 

 comet of 1668, called " nyzek." or " pe- 

 tite lance," 139. 



Charpentier, M., belemnites found in the 

 primitive limestone of the Col de la 

 Seigne, 261 ; glaciers, 329. 



Chemistry as distinguished from physics, 

 62 ; chemical affinity, 63. 



Chevandier, calculations on the carbon 

 contained in the trees of the forests of 

 our temperate zones, 281. 



Childrey first described the zodiacal light 

 in his Britannia Baconica, 138. 



Chinese accounts of comets, 99, 100, 101 ; 

 shooting stars, 128 ; "fire springs." 158 ; 

 knowledge of the magnetic needle, 180; 

 electro-magnetism, 188, 189. 



Chladni on meteoric stones, &c., 118, 

 135 ; on the selenic origin of aerolites, 

 121 ; on the supposed phenomenon of 

 ascending shooting stars, 122 ; on the ob- 

 scuration of the Sun's disk, 133 ; sound- 

 figures, 135; pulsations in the tails of 

 comets, 143, 



Choiseul. his chart of Lemnos, 246. 



Chromatic polarization. See Polarization. 



Cirro-cumulus cloud. See Clouds. 



Cirrous strata. See Clouds. 



Clark, his experiments on the variations 

 of atmospheric electricity, 335, 336. 



Clarke, J. G., of Maine, U. S., on the comet 

 of 1843, 100. 



Climatic distribution of heat, 313, 317- 

 328 ; of humidity, 328, 333, 334. 



Climatology, 317-329 ; climate, general 

 sense ot! 317, 318. 



Clouds, their electric tension, color, and 

 height, 336, 337; connection of cirrous 

 strata with the Aurora Borealis, 196 ; 

 cirro-cumulus cloud, phenomena of, 

 197 ; luminous, 202 ; Dove on their for- 

 mation and appearance, 315, 316 ; often 

 uresent on a bright summer sky the 



"projected image" of the soil below, 

 316 ; volcanic, 233. 



Coal formations, ancient vegetable re 

 mains in, 280, 281. 



Coal mines, depths of, 158-160. 



Cclebrooke on the snow-line of the two 

 sides of the Himalayas, 31. 



Colladon, electro-magnetic apparatus, 335. 



Columbus, his remark that "the Earth is 

 small and narrow," 164 ; found the com- 

 pass showed no variation in the Azores, 

 181, 182 ; of lava streams, 245 ; noticed 

 coniferae and palms growing together in 

 Cuba, 282 ; remarks in his journal on 

 the equatorial currents, 307 ; of the Sar- 

 gasso Sea, 308 ; his dream, 310, 311. 



Comets, general description of, 99-112; 

 Biela's, 43, 86, 107, 108 ; Blaupain's, 108 ; 

 Clausen's, 108 ; Encke's, 43, 64, 86, 106- 

 108 ; Faye's, 107, 108 ; Halley's, 43, 100, 

 102-109 ; Lexell's and Burckhardt's, 

 108, 110 ; Messier's, 108 ; Olbers's, 109 ; 

 Pons's. 109 ; famous one of 1668, seen 

 in Peisia, called "nyzek," or "petite 

 lance," 189 ; comet of 1843, 101 ; their 

 nucleus and tail, 87, 100; small mass, 

 100 ; diversity of form, 100-103 ; light, 

 104-106 ; velocity, 109 ; comets of short 

 period, 107-109 ; long period, 109, 110 ; 

 number, 99 ; Chinese observations on, 

 99-101 ; value of a knowledge of their 

 orbits, 43 ; possibility of collision of Bi- 

 ela's and Encke's comets, 107, 108 ; hy- 

 pothesis of a resisting medium conjec- 

 tured from the diminishing period of 

 the revolution of Encke's comet, 106 ; 

 apprehensions of their collision with 

 the Earth, 108, 110, 111 ; their popular 

 supposed influence on the vintage. 111. 



Compass, early use of by the Chinese, 

 180 ; permanency in the West Indies, 

 181. 



Condamine, La, inscription on a marble 

 tablet at the Jesuit's College, Quito, on 

 the use of the pendulum as a measure 

 of seconds, 166, 167. 



Condi, notice of a heavy shower of shoot- 

 ing stars, Oct., 902, 119. 



Coraboeuf and Delcrois, geodetic opera- 

 tions, 304. 



Cordilleras, scenery of, 26, 29, 33 ; vege- 

 tation, 34, 35 ; intensity of the zodiacal 

 light, 137. 



Cosmography, physical, its object and ul- 

 timate aims, 57-60 ; materials, 60. 



Cosmos, the author's object, 38, 78 ; prim- 

 itive signification and precise definition 

 of the word, 69 ; how employed by 

 Greek and Roman writers, 69, 60 ; der- 

 ivation, 70. 



Craters. See Volcanoes. 



Curtius, Professor, his notes on the tem- 

 perature of various springs in Greece, 

 222, 223. 



C'uvier, one of the founders of the archae 

 ology of organic life, 273 ; discovery ol 

 fossil crocodiles in the tertiary forma 

 tion, 274. 



DaiPiachos on the phenomena attending 



