INDEX. 



Jan Mayen, Island of, p. 328. 



Japan, volcanoes of, p. 355361. 



Java, springs of gas in, p. 217218, volcanoes of, p. 279289, 364 and 445, and 



Notes 320 and 405 425; ribbed character, p. 284285. 

 Jezo, Island of, p. 355. 

 Jorullo, description of, and circumstances attendant on its upheaval, p. 289301, 



and Notes 430, and 436. 

 Junghuhn (Franz), his writings on Java, p. 279288 ; also, on volcanoes in other 



islands in the Indian Ocean, p. 364366. 



Ice, stratum qf ground, p. 4248, Notes 4551 . 



Iceland, its volcanoes and hot springs, &c., p. 210211 and 329, 420, Note, 555. 



Illimani, Note 372. 



Inclination, magnetic, points of 90, p. 92 and 108 ; line, of no, p. 92, 109 ; first 

 observed by Norman in 1576, p. 58; first map of, by Wilke, 1768, p. 63? 

 diurnal variation of, p. 106, 112-117; secular change of, p. 117120; in- 

 fluence of height above, or depth beneath, the earth's surface on, p. 120-125. 



Indian Ocean, volcanoes of, p. 367371. 



Intensity of magnetic force see Force. 



Ischia, p. 326, and Note 385. 



Isodynamic, magnetic, lines, description, p. 95. 



Isogonic, magnetic, lines, present distribution of, p. 144 153. 



Izalco, Volcan de, p. 255256. 



Kamtschatka, volcanoes of, p. 342348, Notes 349352. 



Karafuto, Island of, Note 485. 



Keilhau, p. 71. 



Kerguelen Island, p. 370. 



Kilauea, lava-lake of, p. 375376, and Notes 341, 512 and 513. 



King, p. 71. 



Kirauea see Kilauea. 



Kosima, volcano of, p. 244. 



Kotzebue, p. 67. 



Kreil, terrestrial magnetism, p. 81, 82, 84, and 451. 



Krusenstern, p. 65 ; eruption of smoke in the Atlantic Ocean, p. 331 332. 



Kupffer, ground-ice, p. 47 ; terrestrial magnetism, p. 73 and 74. 



Kurile Islands, p. 354. 



La Condamine, p. 275, 308, 309, and Note 446. 



Lactagunga, pumice-stone quarries of, p. 320. 



Lamanon, p. 63 and 94. 



Lainont, terrestrial magnetism, p. 81 and 88, and Note 178. 



Laplace, figure of the earth, p. 2324 and 483. 



Lava, emission of, from fissures, p. 182,223 224,308,348, Note 306; supposed 

 absence of, in Java, p. 288; and in the Cordilleras, p 309316, and Notes 446 

 and 450; presence of, in some Central American volcanoes, p. 266; further 

 remarks, p. 288 ; ancient descriptions of, Note 306 ; angle of fall of streams 

 Of, p. 223. 



Lava-fields, p. 304, 383, and Note 423. 



Lava-lake see Kilauea. 



Let'roy, observations for the maximum of magnetic force, p. 96 and 97. 



Lemnos, p. 326. 



