VOLCANOES.
(For the Mirror.)
To describe the awful grandeur and terrific phenomena of volcanic eruptions in an adequate manner, is perhaps beyond the power of language. The number of volcanoes now known is about four hundred; nearly all of them are situated a small distance from the sea, and many appear to have been burning from time immemorial.
A certain mixture of sulphur, steel-filings and water, buried a short depth from the ground, will exhibit a kind of miniature volcano; and hence some philosophers have concluded, that in the bowels of burning mountains there are various sorts of bodies which probably ferment by moisture, and being thus expanded, at last produce eruptions and explosions. The mouth or chimney of a burning mountain is, in many instances, upwards of a mile across! from which, in an eruption, are emitted torrents of smoke and flame, rivers of lava, (consisting chiefly of bitumen and melted metal,) and clouds of cinders, stones, &c. to an immense distance. The wonderful quantity of these materials thrown out from the orifice almost exceeds belief; the lava rushes like a fiery torrent at a very rapid pace,—ravages the labours of agriculture, overthrows houses, and in a few seconds utterly destroys the hopes of hundreds of families—the toils of hundreds of years. Nothing impedes its awful course; when interrupted by stone walls, or even rocks, it collects in a few moments to the height of eight or ten feet; its immense heat and violent pressure quickly batter down the obstacle, which is literally made rotten by the fire, and the whole mass seems to melt together into the lava, which again continues its progress until exhausted by the distance of its destructive march.
An English traveller, who was at Naples during the eruption of Mount Vesuvius, on the 10th of September, 1810, thus describes the scene:—
"Curious to witness the volcano as near as possible, I set out for Portici, where I arrived at eight in the evening; from thence to the summit of the mountain the road is long and difficult; having procured a guide about the middle of the distance, we had to climb a mountain of cinders, every step nearly knee-deep; this made it near midnight when we reached the crater, which we approached as near as the heat would permit. The fire of the mountain served us for a beacon, and we set light to our sticks in the lava, which slowly ran through the hollows of the crater. The surface of the inflamed matter nearly resembles metal in a state of fusion, but as it flows it carries a kind of scum, which gradually hardens into scoria and rolls like fire-balls to the bottom of the mountain. We thought ourselves pretty secure in this spot, and had no wish to retire; but shortly a most terrific explosion which launched to an inconceivable height in the air, immense fragments of burning rocks, &c. reminded us of our dangerous situation. We lost not a moment in retreating, and driven on by fear almost with miraculous speed, cleared in about five minutes, a space we had taken two hours to climb; we had hardly gained this spot when a second explosion more terrible, if possible, than the former was heard. The volcano in all its fury vomited forth some thousands of cart-loads of stones and burning lava. As the projection was nearly vertical, the greater part fell back again into the mouth of the mountain and this was again vomited forth as before. On the 11th and 12th, the fury somewhat abated, but on the 13th a fresh eruption commenced, and burning matter flowed down all the sides of the volcano;—all Vesuvius itself seemed on fire,—not a vestige of property for miles could be discovered, and thousands of families were ruined."
JACOBUS.