COSMOS. 



the 1'all of the stone of JSgoa Potamos, 

 133, 134. 



Dalinan on the existence of Chiontea ara- 

 neoides in polar snow, 344. 



Dalton, observed the southern lights in 

 Knglnnd, 198. 



Dante, quotation from, 322. 



Darwin, Charles, fossil vegetation in the 

 travertine of Van Diemen's Land, 224 ; 

 central volcanoes regarded as volcanic 

 chains of small extent on parallel fis- 

 sures, 238; instructive materials in the 

 temperate zones of the southern hem- 

 isphere for the study of the present and 

 pust geography of plants, 282, 283 ; on 

 tlie fiord formation at the southeast end 

 of America, 293 ; on the. elevation and 

 depression of the bottom of the South 

 Sea, 297 ; rich luxuriance of animal life 

 m the ocean, 309, 310 ; on the volcano 

 of Aconcagua, 330. 



Daubeney on volcanoes. See Transla- 

 tor's notes, 161, 203, 204, 210, 218, 224, 

 228, 230, 233, 234, 233, 23G, 244, 245. 



Daussy, his barometric experiments, 298 ; 

 observations on the velocity of the equa- 

 torial current, 307. 



Davy, Sir Humphrey, hypothesis on act- 

 ive volcanic phenomena, 235; on the 

 low temperature of water on shoals, 309. 



Dead Sea. its depression below the level 

 of the Mediterranean, 296, 297. 



Dechen, Von. on the depth of the coal- 

 basin of Liege, 160. 



Delcrois. See Corabceuf. 



Descartes, his fragments of a contempla- 

 ted work, entitled " Monde," 68 ; on 

 comets, 139. 



Deshayes and Lyell, their investigations 

 on the numerical relations of extinct 

 and existing organic life. 275. 



Dicsearchus, his "parallel of the dia- 

 phram," 289. 



Diogenes Laertius, on the aerolite of 

 mt Potamos, 116, 122, 134. 



D'Orbigny, fossil remains from the Hima- 

 laya and the Indian plains of Cutch, 277. 



Dove on the similar action of the declina- 

 tion needle to the atmospheric electrom- 

 eter, 194; "law of rotation," 315; on the 

 formation and appearance of clouds, 

 316 ; on the difference between the 

 true temperature of the surface of the 

 ground and the indications of a ther- 

 mometer suspended in the shade, 325 ; 

 hygrometric windrose, 333. 



Doyere, his beautiful experiments on the 

 tenacity of life in animalcules, 345. 



Drake, shaking of the earth for successive 

 days in the United States (1811-12), 211. 



Dufrenoy et Elie de Beaumont, G6oloirie 

 de la France, 253, 258, 259, 260, 262, 266. 



Dumas, results of his chemical analysis 

 of the atmosphere, 311. 



Dunlop on the comet of 1825, 103. 



Ouperrey on the configuration of the mag- 

 netic equator, 183; pendulum oscilla- 

 tions, 166. 



Duprez, influence of trees on the intensi- 

 ty of electricity in the atmosphere. 335. 



Eandi, Vassalli, electric perturbation dut 

 ing the protracted earthquake of Pigiie- 

 rol, 206. 



Earth, survey of its crust, 72 ; relative 

 magnitude, &c., in the solar system, 

 95-97; general description of terrestri- 

 al phenomena, 154-369; geographical 

 distribution, 161, 162; its mean density, 

 169-172 ; internal heat and temperature. 

 172-176; electro-magnetic activity, 177 

 193 ; conjectures on its early high tern 

 perature, 172 ; interior increase of heat 

 with increasing depth, 161 ; greatest 

 depths reached by human labor, 157- 

 159 ; methods employed to investigate 

 the curvature of its surface, 165-168 ; 

 reaction of the interior on the external 

 crust, 161,202-247; general delineation 

 of its reaction, 204-206 ; fantastic views 

 on its interior, 171. 



Earthquakes, general account of, 204-218 , 

 their manifestations, 204-206 ; of Rio- 

 bamba, 204. 206, 208, 213, 214 ; Lisbon, 

 210. 211, 213, 214 ; Calabria, 206 ; their 

 propagation, 204, 212, 213; waves ot 

 commotion, 205, 206, 212 ; action on 

 gaseous and aqueous springs, 210, 222, 

 224 , salses and mud volcanoes, 224- 

 228 ; erroneous popular belief on, 206- 

 208 , noise accompanying earthquakes, 

 208-210; their vast destruction of life, 

 210, 211 ; volcanic force, 214, 215; deep 

 and peculiar impression produced on 

 men and animals, 215, 216. 



Ehrenberg, his discovery of infusoria in 

 the polishing slate of Bilin, 150 ; infuso- 

 rial deposits, 255, 262 ; brilliant discov- 

 ery of microscopic life in the ocean and 

 in the ice of the polar regions, 342; rap- 

 id propagation of animalcules and their 

 tenacity of life, 343-345; transforma- 

 tion of chalk, 262. 



Electricity, magnetic, 188-202 ; conjec- 

 tured electric currents, 189, 190; elec 

 trie storms, 194 ; atmospheric, 335 

 337. 



Elevations, comparative, of mountains in 

 the two hemispheres, 28, 29. 



Encke, 106 ; his computation that the 

 showers of meteors, in 1833, proceeded 

 from the same point of space in the di- 

 rection in which the Earth was moving 

 at the time, 119, 120. 



Ennius, 71. 



Epicharmus, writings of, 71. 



Equator, advantages of the countries hoi 

 dering on, 33, 34 ; their organic richness 

 and fertility, 34, 35 ; magnetic equator, 

 183-185. 



Erman, Adolph, on the three cold days 

 of May (llth-13th), 133 ; lines of decli- 

 nation in Northern Asia, 182: in the 

 southern parts of the Atlantic, 187 , 

 observations during the earthquake al 

 Irkutsk, on the non-disturbance of the 

 horary changes of the magnetic needle, 



Eruptions and exhalations (volcanic), la- 

 va, gaseous and liquid fluids, hot mud* 

 mud mofettes. &c.. 161. 210-1/10 



