74 Notice of Active and Extinct Volcanos* 



tion of 79 in Campania, and in that of Etna in 1537, where, says 

 Fazzello, noises were heard, and shocks experienced, over the 

 most distant parts of Sicily. In such cases no one would doubt the 

 connection between the volcano and the earthquake." 



Teneriffe, furnished with the volcanic vent of Teyde, en- 

 joys comparative immunity, while the neighboring islands 

 are dreadfully agitated. If it be objected, that earthquakes 

 are too extensive to have their effects attributed to the same 

 cause with volcanos, we may reply, that volcanic movements 

 generally accompany or succeed them, although it may be 

 in remote countries, and the earthquakes of one country are 

 often connected with those of another. 



"During the earthquake at Lisbon, in 1755, almost all the 

 springs and lakes in Britain and in every part of Europe, 

 were violently agitated ; many of them throwing up mud 

 and sand, and emitting a fetid odor. The morning of the 

 earthquake, the hot springs at Toplitz, in Bohemia, suddenly 

 ceased to flow for a minute, and then burst forth with prodi- 

 gious violence, throwing up turbid water, the temperature of 

 which was higher than before. The hot wells at Bristol, 

 were colored red, and rendered unfit for use for some months 

 afterwards. Even the distant waters of lake Ontario, in 

 North America, were violently agitated at the time. After 

 the earthquake at Lisbon, Europe, Asia, Africa, and America 

 were, for some time, violently agitated by subterranean ex- 

 plosions. Etna, which had been in a state of profound re- 

 pose for eighty years, broke out with great activity, and 

 some of the most tremendous earthquakes and volcanic erup- 

 tions recorded in history were witnessed in Mexico." (Bake- 

 well's Geology.) It was at this time, (September 19, 1759,) 

 that the mountain Jorullo, and the attending hornitos, al- 

 ready described, broke forth. 



" During the earthquake at Lisbon, nearly all Europe, and 

 a great part of Africa, felt the shock, more or less severely ; 

 its effects were sensible even across the Atlantic." Vibrations 

 that are not perceived on the surface, are sometimes experi- 

 enced in mines. "During the earthquake at Lisbon, the mi- 

 ners felt the rocks move, and heard noises, which were scarce- 

 ly perceived by those above ; and Humbolt says, that he has 

 seen workmen hasten from the mines in Marienburg, in Sax- 

 ony, alarmed by agitations of the earth, that were not felt on 



