CHAPTER XV.

SUBTERRANEAN HEAT--ITS POWERS ILLUSTRATED BY VOLCANOS.

Effects of subterranean Heat in the present Age of the World--Vast Accumulations of solid Matter from the Eruptions of Volcanos--Buried Cities of Pompeii and Herculaneum--Curious Relics of Roman Life--Monte Nuovo--Eruption of Jorullo in the Province of Mexico--Sumbawa in the Indian Archipelago--Volcanos in Iceland--Mountain Mass of Etna the Product of Volcanic Eruptions--Volcanic Islands--In the Atlantic--in the Mediterranean--Santorin in the Grecian Archipelago, 244