Observations on Mount Vesuvius, Mount Etna, and Other Volcanos: In a Series of Letters, Addressed to the Royal Society, from the Honourable Sir W. Hamilton ...

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T. Cadell, 1774 - 179 pàgines
 

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Pàgina 110 - The crater was five miles in circumference, and about a thousand paces deep ; its sides were covered with brushwood, and at the bottom there was a plain on which cattle grazed. In the woody parts, wild boars frequently harboured. In one part of the plain, covered with ashes, were three small pools, one filled with hot and bitter water, another salter than the sea, and a third hot, but tasteless.
Pàgina 76 - ... of a later date, and which preferve their pyramidal form entire. Some have been fo far mouldered down by time, as to have no other appearance of a crater than a fort of dimple...
Pàgina 141 - ... same force; the third day the eruption ceased, and I went up with many people to the top of the new hill, and saw down into its mouth, which was a round cavity about a quarter of a mile in circumference, in the middle of which the stones which had fallen were boiling up just as a caldron of water boils on the fire.
Pàgina 28 - After having taken breath, as the earth trembled greatly, I thought it most prudent to leave the mountain and return to my villa; where I found my family in great alarm, at the continual and violent explosions of the volcano, which shook our house to its very foundation, the doors and windows swinging upon their hinges.
Pàgina 83 - ... and is in many parts fifteen miles in breadth. As the lavas of Etna are very commonly fifteen and twenty miles in length, fix or feven in breadth, and fifty feet or more in depth, you may judge, fir, of the prodigious quantities of matter emitted in a. great eruption of this mountain, and of the vaft cavities there mufl neceffarily be within its bowels.
Pàgina 27 - I stood the mountain split; and with much noise, from this new mouth, a fountain of liquid fire shot up many feet high, and then like a torrent rolled on directly towards us.
Pàgina 27 - The earth shook at the same time that a volley of pumice stones fell thick upon us. In an instant clouds of black smoke and ashes caused almost a total darkness ; the explosions from the top of the mountain were much louder than any thunder I ever heard, and the smell of the sulphur was very offensive.
Pàgina 68 - Selvofa, the woody, than which nothing can be more beautiful. On every fide are mountains, or fragments of mountains, that have been thrown up by various ancient...
Pàgina 100 - Herculaneum was swallowed up ; but we are informed by unquestionable authority, that "the matter which covers the ancient town of Herculaneum is not the produce of one eruption only; for there are evident marks, that the matter of six eruptions has taken its course over that which lies immediately above the town, and was the cause of its destruction. These strata are either of lava or burnt matter, with veins of good soil betwixt them...
Pàgina 75 - Englifh miles. . The pyramidal fhadow of the mountain reached acrofs the whole ifland, and far into the fea on the other fide. I counted from hence forty-four little...

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