460 



INDEX. 



Polarity, the force of, unknown to the; Richer, observations on the pendulum, by, 



Greeks and Romans, 51. 23. 



Poles, magnetic, traditions regarding, 56 ; Rigaud, Professor, on the proportion of 



Halley's variation chart, 60. water and terra firma, 363. 



Polybius, his knowledge of Strongyle, 244. iRindjani, a volcano, its height, 357. 

 Polynesia and similar divisional terms, obvRiobamba, terrible earthquake at, 161, 166, 



jected to, 364. 

 Pomarape, volcano of, 271. 

 Popocatepetl, a volcano, 239 ; meaning of 



167. 



Rio Vinagre, described, 194. 

 Rock-debris, 311. 



the name, 228; determinations of the Rocky Mountains, the chain described. 



height of, 427, 



Porphyries of America, 443. 



Porphyry of the Puy de Dome, its peculiar 

 character, 421. 



Porto Cabello, hot springs of, 190. 



Pozzuoli, eruption from the solfatara of, 

 395. 



Procida or Prochyta, 252. 



Proclus on earthquakes, 173. 



Pulu Batu, lava streams of, 353. 



Pnmex Pompejanus, 402. 



Pumice not found at Jorullo, 301; abun- 

 dant in Lipari, 320 ; the pumice quarries 

 of Lactacunga, 321; of Cotopaxi, 322; 

 isolated eruptions of, 323; found in 

 Madagascar, 360; and in the island of 

 Amsterdam, 361; Humboldt's view of 

 its formation, 450. 



Pumice eruption of the Eifel, 226. 



Punhamuidda, volcano of, 274. 



Pusambio, the river, acidified by sulphur, 

 194. 



Pyrenees, highest summ'is of the, 220, 221. 



Pyriphlegethon, Plato's rreoiruostic myth, 

 37, 254. 



Qnelpaert's island, a volcano, 353. 



Quesaltenango, Volcan de, 262. 



Quetelet on daily variations of tempera- 

 ture, 41. 



Quindiu. See Azufral de Quindiu. 



Quito, observations on the older rocks of 

 the volcanic elevated plains of, 415. 



Quito and New Granada, the group of vol- Sanidine, 443. 



canoes of, 266. 



Rainier (or Regnier) Mount, an active vol- 

 cano, 390. 



Rains, regions of summer, autumn, and 

 winter, ISO. 



Raking of mountain chains explained, 

 278. 



rock, 431. 



Ranco, volcano of, 274. 

 Rapilli, 223. 

 Raton Mountains, extinct volcanoes of the, 



Regnier, Mount, an active volcano, 391. 



Rehme, the Artesian well at, 39. 



Reich's experiments to determine the dens- 

 ity of the earth, 34; the subject more 

 lately investigated by Airy, 35. 



Results of observations in the telluric por- 



3S5; traces of ancient volcanic action, 



387; parallel coast ranges, still volcanic, 



388. 



Ronquido and bramido, distinguished, 250. 

 Rope-boring of the Chinese, 209. 

 Rose, Guatav, his classification of volcanic 



rocks, 420, 423. 

 Ross, Sir James Clark, his Antarctic voy- 



. . 5, 141. 

 Ross, John, his Polar voyages, C5. 

 Rucu-Pichincha, its meaning, 231. 

 Ruido, el (/ran, 166. 



Sabine, Major-General, his pendulum ex- 

 pedition, 26 ; on the horary and annual 

 variations, 81 ; on the influence of the 

 moon on terrestrial magnetism, 84. 



Sacramento Butt, an extinct crater, 389. 



Saghalin, called Krafto by the Japanese, 

 345. 



Sahama, Volcan de, 271. 



Salses and naphtha springs, 199. 



Salt Lake, Great, of the Mormons, 3S3. 



San Bruno, rotatory motion of the obeliskg 

 before the monastery of, in Calabria, 166. 



San Clemente, volcano of, 274. 



Sandwich Islands, a volcanic Archipelago, 

 366; the volcanoes, 233; height of some 

 greatly exaggerated, 238. 



Sangai or Sangay, the volcano, 239: its 

 position, 239; the most active r of the 

 South American volcanoes, 249; its erup- 

 tions observed by "Wisse, 175. 



San Miguel Bosotlan, a volcano, 261. 

 San Pedro de Atacama, Volcan de, 272. 

 San Salvador, a volcano, eruptions of, 261. 

 Santa Cruz, volcano of, 369. 

 Santorin, volcanic eruption of, 219. 

 San Vicente, a volcano, eruptions of, 261. 

 Saragyri, hot springs of, 325. 

 Sawelieff on magnetic inclination, 111. 



Rammelsberg's analysis of the Chimborazo Schagdagh, the perpetual fires of the, 201. 



Schergin's shaft, at Jakutsk, 45. 

 Schiwelutsch, a volcano, its peculiar form, 



Schlagintweit, the brother?, observations on 



springs, 1S3; traverse the Kuen-liin, 410. 

 Schrenk on the frozen soil in the country 



of the Samojedes, 48. 

 Sea, distance of volcanic activity from the, 



statements of, examined, 404; volcanic 



eruption observed in the, 354. 

 Seals found in the Caspian Sea and the Sea 



tion of the physical description of the of Baikal, 408 ; also in the distant fresh- 

 universe, 13. | water lake of Oron, 408. 



Revillagigedo, volcanic islands of, 266. Secular variation of the magnetic inclina- 



Pubbed formation of the volcanoes of the isl- j tion, 109. 

 and of Java, 286 ; analogous phenomena. Semi- volcanoes, 396. 

 of the mantle of the Somma of Vesuvius, 'Senarmont, his preparation of artificial 

 288. I minerals, 195. 



