INDEX. 



457 



ZTo-se/wm and Ho-ttsing, of Eastern Asia, 

 200. 



Humboldt, Alexander von, observations of 

 temperature in Mexico and Peru, 43; 

 magnetic observations by, 95; his de- 

 termination of the magnetic equator, 

 102 ; observations of polar bands, 150 ; 

 visit to the scene of the earthquake of 

 Riobamba, 160 ; observations of the phe- 

 nomena of an eruption of Vesuvius, 174; 

 barometrical measurements of the same 

 mountain, 236 ; his definition of the term 

 u volcano," 272; his visit to Jorullo, 

 295, 301 ; the name Jura limestone in- 

 troduced by, 436; apparatus employed 

 by, in the New World, 429 ; his miner- 

 aiogical collections, 445; on the forma- 

 tion of pumice, 450. 



Ilumboldt, Alexander von, works by, cited 

 in the text or notes : 

 Asie Centrale, 52, 100, 114, 143, 144, 

 170, 199, 202, 209, 210, 238, 279, 316, 

 334, 336, 338, 349, 353, 409. 



Invariable temperature, stratum of, 41. 



Ischia, 252. 



Island of Desolation. See Kerguelen 1 s Isl- 

 and. 



Island?, temporary, enumerated, 32S. 



Islands and the shores of continents, great 

 number of volcanoes found on, 403. 



Islands of the Pacific, Dana's classification 

 of, 365. 



Isluga, volcano of, 271. 



Izalco, volcano of, described, 248 ; its erup- 

 tions, 261. 



Iztaccihuatl, a volcano, meaning of the 

 name, 228. 



Jacob, valley of, on Ararat, 230. 



Jakutsk, mean annual temperature of, 4G ; 

 extreme variations, 4T. 



Jan Mayen, volcanoes of the island of, 330. 



Japan, notice of the volcanoes of, commu- 

 nicated by Siebold, 350. 



Jaques de Vitry, his mention of the mag- 

 netic needle, 54. 



Atlas Geographique et Physique de la Java, large number of volcanoes in, 281 ; 



Nouvelle Espagne, 228, 235, 250, 



291, 404. 

 Essai Geognostique snr le Gisement 



des Roches, 212, 302, 415, 425, 436, 



442, 450. 

 Essai sur la Geographic des Plantes, 



239, 427. 



Essai Politique sur la Nouvelle Es- 

 pagne, 44, 189, 265, 277, 293, 294, 



307, 379, 380, 391, 427. 

 Examen Critique de THistoire de la 



Geographic, 52, 115, 123, 173, 233, 



248. 

 Eragmens de Geologic et de Climato- 



logie Asiatiques, 349, 354. 

 Kleinere Schriften, 165, 205, 228, 275, 



315, 316, 321, 422, 446. 

 Recueild' Observations Astronomique?, 



43, 103, 139, 212, 239, 265, 297, 307. 



, , t>, , , , , . , , . 



Relation Historique du Voyage aux Jumnotri, hot well of, 190. 



Regions Equinoxiales, 96, 110, 113, 

 115, 167, 168, 179, 237, 238, 286, 394, 

 396' 399. 



Views of Nature, 248, 343, 381, 399. 

 Vues des Cordilleres, 208, 228, 230, 235. 

 Ilypersthene rock, its employment for or- 

 namental purposes, 446. 

 llypsometry of volcanoes, first group, 235; 

 second group, 235; third group, 236; 

 fourth group, 238 ; fifth group, 239. 



Iceland, the Geysers of, 190 ; mud springs, 



203; volcanoes, 330. 



Ilha do Fogo, one of the Cape Verd Isl- 

 ands, so called, 249. 

 Impulse in volcanic phenomena, summary 



of views on, 162. 

 Inarima, 253. 

 Inclination, magnetic, 100; maxima and 



minima, 107 ; secular variation, 109. 

 Indian Ocean, volcanoes of the, 358, 363. 

 Infusoria, universal diffusion of the, 26. 

 Intensity of the magnetic terrestrial force, 



58, 61, 87. 

 Interior of the earth, it? reaction on the 



surface, 157. ee, also, Earthquakes. 



Volcanoes. 



VOL. V. U 



their comparatively low elevation, 282 ; 

 direction of the principal axis, 284 ; vast 

 craters of some, 284 ; ribbed formation, 

 286: lava streams, 288; salses of, and 

 mofette grottoes, desciibed by Jung- 

 huhn, 210; tertiary formations, 281. 



Javanese names of mountains explained, 

 290. 



Jefferson, Mount, 389. 



Jesso, island of, 349 ; its numerous vol- 

 canoes, 350. 



Jorullo, rise of the volcano, 266, 291 ; de- 

 scription of, by eye-witnesses, 292 ; vis- 

 it of Humboldt to, 295, 300; visit of 

 Buckart, and changes noticed by him. 

 300. 



Juan Jayme, his scientific voyage, 5G. 



Julia, the volcanic island, 328. 



Julius, the proconsul, 188. 



Junghuhn, his researches in Javn, 210, 281. 

 Jura limestone, name introduced by Hum- 

 boldt, 43C. 



Kaimenes, upheaval of the three, 328. 



Kamtschatka, the loftiest volcano of Asia 

 found in, 284; described, 340. 



Kerguelen's Island, extinct craters of, 363. 



Kilauea, the great crater of, not a solfa- 

 tara, 367. 



Kina Bailu, a lofty mountain of Borneo, 

 356. 



Kirghis Steppe, former water-courses of 

 the, 408. 



Kljutschewsk, the highest Asiatic vol- 

 cano, 284. 



Korai. See Corea. 



Kotzebue on the volcanic island of Um- 

 nack, 220. 



Krafto. See Saghal'n. 



Krapf, discovery of a volcano in Eastern 

 Africa by, 333. 



Krasnajazarki, polar bands observed by 

 Humboldt at, 150. 



Kreil on the magnetism of the moon, 85. 



Krusenstern on a presumed submarine vol- 

 cano, 332. 



