INDEX. 



457 



Ho-schan and Ho-tsing, of Eastern Asia, 

 209. 



Ilumboldt, 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, 166; observations of the phe- 

 nomena of an eruption of Vesuvius, 174; 



barometrical measurements of the same Izalco, volcano of, described, 248 ; itserup- 



mountain, 236 ; his definition of the term 

 " volcano," 2T2; his visit to Jorullo, 

 295, 301; the name Jura limestone in- 

 troduced by, 436; apparatus employed 

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

 alogical collections, 445; on the forma- 

 tion of pumice, 450. 



Humboldt, 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. 

 Atlas Geographique et Physique de la 



Nouvelle Espagne, 

 291, 404. 

 Essai Geognostique 



235, 250, 

 ir le Gisement 



des Roches, 212, 302, 415, 425, 43G, 



442, 450. 

 Essai sur la G6ographie des Plantes, 



239, 427. 



Essai Politique sur la Nouvelle Es- 

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



307, 379, 380, 391, 427. 

 Examen Critique do 1'Histoire de la 



Geographic, 52, 116, 123, 173, 233, 



248. 

 Fragmens 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. 

 Relation Historique du Voyage aux 



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, 23E 

 Hypersthene rock, its employment for or- 

 namental purposes, 446. 

 Hypsometry 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. 

 Interim- of the earth, its reaction on the 



surface, 157. See, also, Earthquakes, 



Volcanoes. 



VOL. V. U 



Invariable temperature, stratum of, 4L. 



Ischia, 252. 



Island of Desolation. See Kerguelen 1 a Isl- 

 and. 



[slands, temporary, enumerated, 328. 



Islands and the shores of continents, great 

 number of volcanoes found on, 403. 



Islands of the Pacific, Dana's classification 



Isluga, volcano of, 271. 



tious, 261. 



Iztaccihuatl, a volcano, meaning of the 

 name, 22S. 



Jacob, valley of, on Ararat, 230. 



Jakutsk, mean annual temperature of, 46 ; 

 extreme variations, 47. 



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. 



Java, large number of volcanoes in, 281 ; 

 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, described 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, 56. 



jJulia, the volcanic island, 328. 



Julius, the proconsul, 188. 



Jumnotri, hot well of, 190. 



Junghuhn, his researches in Java, 210, 281. 



Jura limestone, name introduced by Hum- 

 boldt, 436. 



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, formeu^water-courses of 

 the, 408. 



Kljutschewsk, the highest Asiatic vol- 

 cano, 284. 



Korai. See Corea. 



Kotzebue on the volcanic island of Uni- 

 nack, 220. 



Krafto. See Saghalin. 



Krapf, discovery of a volcano in Eastern 

 Africa by, 333. 



Krasnajazarki, polar bands observed by 

 Ilumboldt at, 150. 

 reil on the magnetism of the moon, 85. 



Kmsenstern on a presumed submarine vol- 

 cano, 332. 



