Cliarpentier, M., belemnites found in 

 the primitive limestone of the Col de 

 la Seigne, 262 ; glaciers, 336, 337. 



Chemistry, as distinguished from phy- 

 sics, 44 ; chemical affinity, 44. 



Chevandier, calculations on the carbon 

 contained in the trees of the forests 

 of our temperate zones, 284. 



Childrey first described the Zodiacal 

 light, in his Britannia Baconica, 

 127, 128. 



Chinese accounts of comets, 84, 85, 

 86 ; shooting stars, 116;' fire springs," 

 149; knowledge of the magnetic 

 needle, 173; electro-magnetism, 182, 

 183. 



Chladni, on meteoric stones, &c., 

 105, 124; on the selenic origin of 

 aerolites, 108; on the supposed 

 phenomenon of ascending shooting 

 stars, 110; on the obscuration of the 

 Sun's disc, 121; sound-figures, 124; 

 pulsations in the tails of comets, 

 133. 



Choiseul, his chart of Lemnos, 246. 



Chromatic polarization. See Polariza- 

 tion. 



Cirro-cumulus cloud. See Clouds. 



Cirrous strata. See Clouds. 



Clark, his experiments on the varia- 

 tions of atmospheric electricity, 343. 



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

 Comet of 1843, 85, 86. 



Climatic distribution of heat, 319, 323 

 335; of humidity, 335,341,342. 



Climatology, 323 3*36; climate, ge- 

 neral sense of, 323, 324. 



Clouds, their electric tension, colour 

 and height, 344, 345 ; connection of 

 cirrous strata with the Aurora Bo- 

 realis, 191; cirro-cumulous cloud, 

 phenomena of, 192; luminous, 197; 

 Dove on their formation and ap- 

 pearance, 321, 322; often present 

 on a bright summer sky the 'pro- 

 jected image' of the soil below, 322; 

 volcanic. 231. 



Coal formations, ancient vegetable re- 

 mains in, 282,283. 



Coal mines, depths of, 149151. 



Colebrooke, on the snow line of the 

 two sides of the Himalayas, 10. 



Colladon, electro-magnetic apparatus, 

 343. 



Columbus, his remark that ' the Earth 



is small and narrow, 155 ; found the 

 compass showed no variation in the 

 Azores, 174, 175; of lava streams, 

 245; noticed coniferse and palms 

 growing together in Cuba, 285 ; re- 

 marks in his journal on the equato- 

 rial currents, 312; of the Sargasso 

 Sea, 313; his dream, 316. 



Comets, general description of, 84 98; 

 Biela's, 23, 69, 9294 ; Blaupain's, 

 94; Clausen's, 94; Encke's, 23, 46, 

 69, 9294; Faye's, 93, 94 ; Halley's, 

 23,84,8795; Lexell's and Burk- 

 hardt's, 94, 96; Messier's, 94: Gi- 

 bers', 94 ; Pons', 94; famous one of 

 1668, seen in Persia, called ' nyzek,' 

 or ' petite lance,' 128, 129 ; cornet of 

 1843, 85, 86; their nucleus and tail, 

 70; small mass, 85; density of form, 

 8587; light, 8991; velocity, 95; 

 comets of short period, 9294 ; long 

 period, 95,96; number, 84; Chinese 

 observations on, 84 86 ; value of a 

 knowledge of their orbits, 23; pos 

 sibility of collision of Biela's and 

 Encke's comets, 93 ; hypothesis of a 

 resisting medium conjectured from 

 the diminishing period of the revolu- 

 tion of Encke's comet, 92; appre- 

 hensions of their collision with the 

 Earth, 23, 96, 97; their popular 

 supposed influence on the vintage, 

 97. 



Compass, early use of by the Chinese, 

 173; permanency in the West In- 

 dies, 174. 



Condamine, La, inscription on a mar- 

 ble tablet at the Jesuit's College, 

 Quito, on the use of the pendulum 

 as a measure of seconds, 158, 159. 



Concle, notice of a heavy shower of 

 shooting stars, Oct., 902, 106. 



Coraboeuf, and Delcrois, geodetic opera- 

 tions, 309. 



Cordilleras, scenery of, 4, 8, 12; vege- 

 tation, 13,14; intensity of the Zo- 

 diacal light, 126. 



Cosmography, Physical, its objet andc 

 ultimate aims, 38, 39, 40, 41 ; mate- 

 rials, 42. 



Cosmos, the author's object, 18, 61 ; 

 primitive signification and precise 

 definition of the word, 51 ; how em- 

 ployed by Greek and Roman writers, 

 5153; derivation, 52, 53. 



