INDEX, 



497 



Ronquido and Iramido, distin- 

 guished, 263. 



Rope-boricg of the Chinese, 219. 



Rose, Gustav, his classification of 

 volcanic rocks, 449, 453. 



Ross, Sir James Clark, his Ant- 

 arctic voyage, 75, 145. 



Ross, John, his Polar voyages, 65. 



Rucu-Pichincha, its meaning, 242. 



Ruido, el gran, 172. 



Sabine, Major- General, his pendu- 

 lum expedition, 22 ; on the 

 horary and annual variations, 

 82 ; on the influence of the 

 moon on terrestrial magnetism, 

 viii. 



Sacramento Butt, an extinct 

 crater, 416. 



Saghalin, called Krafto by the 

 Japanese, 367. 



Bahama, Volcan de, 286. 



Salses and naphtha springs, 207. 



Salt Lake, Great, of the Mormons, 

 410. 



San Bruno, rotatory motion of the 

 obelisks before the monastery 

 of, in Calabria, 172. 



San Clemen te, volcano of, 290. 



Sandwich Islands, a volcanic ar- 

 chipelago, 391 ; the volcanoes, 

 245 ; height of some greatly 

 exaggerated, 250. 



Sangai or Sangay, the volcano, 

 251 ; its position, 251 ; the most 

 active of tho South American 

 volcanoes, 262; its eruptions 

 observed by Wisse, 182. 



Sanidine, 475. 



San Miguel Bosotlan, a volcano, 

 275. 



San Pedro de Atacama, Volcan de, 

 287. 



San Salvador, a volcano, eruptions 

 of, 275. 



Santa Cruz, volcano of 395. 



San Vicente, a volcano, eruptions 

 of, 275. 



Santorin, volcanic eruption of, 

 229. 



VOL. V. 



I Saragyn, hot springs of, 346. 



Sawelieff on magnetic inclination, 

 113. 



Schagdagh, the perpetual fires of 

 the, 210. 



Schergin's shaft, at Jakutsk, 43. 



Schiwelutsch, a volcano, its pecu- 

 liar form, 248 



Schlagintweits, the brothers, ob' 

 servations on springs, 191; tra 

 verse the Kuen-lun, 439. 



Schrenk, on the frozen soil in the 

 country of the Samojedes, 46. 



Sea, distance of volcanic activity 

 from the, statements of, exa- 

 mined, 432 ; volcanic eruption 

 observed in the, 377 



Seals found in the Caspian Sea, 

 and the Sea of Baikal, 437; also 

 in the distant fresh-water lake 

 of Oron, 437. 



Secular variation of the magneti 

 inclination, 111. 



Semi-volcanoes, 424. 



Senarmont, his preparation of 

 artificial minerals, 204. 



Seneca on volcanoes, 226. 



Sesaya, volcano of, 395. 



Shasty mountains, basaltic lavas 

 found in the, 416. 



Siebengebirge, trachyte of the, 

 237 ; geological topography, 454. 



Siebold on the volcanoes of Japan, 

 373. 



Sierra Madre, erroneous notions 

 regarding the, 405, 410 ; east 

 and west chains, 410. 



Silla Veluda, volcano of, 289. 



Silurian and Lower Silurian for- 

 mations, eruptive trap masses 

 of the, 350, 483. 



Silver in sea-water, its presence 

 how manifested, 440. 



Sitka or Baranove, 43, 269. 



Smyth, Capt., on the Columbretes, 

 350 ; determination of the 

 height of Etna, 249. 



Society Islands, the geology of, 

 recommend***! for investigation, 

 399. 



2K 



