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Updated: April 30, 2025
The vitality of the volcano is therefore due, not to the presence of water, but to the welling up of matter from the internal reservoir through the throat of the volcano. Pantelleria. This island, lying between the coast of Sicily and Cape Bon in Africa, is wholly volcanic. It has a circumference of thirty miles, and from its centre rises an extinct crater-cone to a height of about 3000 feet.
The likeness certainly exists; for the rock, being the same in both places, has taken the same general form; and the wanderer in Rhine-Prussia and Nassau might often fancy himself in Devon or Cornwall. True, here there is no sea: and there no Moselkopf raises its huge crater-cone far above the uplands, all golden in the level sun.
Webb, however, was unable to confirm this estimate, though he noted it as very bright, and saw a minute black pit and narrow ravine within it. Neison subsequently found that the black pit is a crater-cone.
It would perhaps be rash, with our limited knowledge of minute lunar detail, to assert that Madler over-estimated the brightness of this area, which may have been due to a recent deposit round the orifice of the crater-cone. POISSON. An irregular formation on the W. of Aliacensis, extending about 50 miles from W. to E., but much less in a meridional direction.
View of the crater of Vesuvius before the eruption of 1767, showing an interior crater-cone rising from the centre of the exterior crater. But before giving a description of this terrific outburst of volcanic energy, it may be desirable to give some account of the physical position and structure of this mountain, by which the phenomena of the eruption will be better understood.
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