CHAPTER XLVI

CATANIA

“YESTERDAY,” Uncle Paul resumed, “Jules asked me if the lava-streams

could not reach towns situated near volcanoes. The following story will

answer his question. It is about an eruption of Mount Etna.”

“Etna is that volcano in Sicily where the big chestnut tree of a hundred

horses is?” asked Claire.

“Yes. I must tell you that two hundred years ago there occurred in

Sicily one of the most terrible eruptions on record. During the night,

after a furious storm, the earth began to tremble so violently that a

great many houses fell. Trees swayed like reeds shaken by the wind;

people, fleeing distracted into the country to avoid being crushed under

the ruins of their buildings, lost their footing on the quaking ground,

stumbled, and fell. At that moment Etna burst in a fissure four leagues

long, and along this fissure rose a number of volcanic mouths, vomiting,

amid the crash of frightful detonations, clouds of black smoke and

calcined sand. Soon seven of these mouths united in an abyss that for

four months did not cease thundering, glowing, and throwing up cinders

and lava. The crater of Etna, at first quite at rest, as if its furnaces

had no connection with the new volcanic mouths, woke up a few days after

and threw to a prodigious height a column of flames and smoke; then the

whole mountain shook, and all the crests that dominated its crater fell

into the depths of the volcano. The next day four mountaineers dared to

climb to the top of Etna. They found the crater very much enlarged by

the falling-in of the day before: its orifice, which before had measured

one league, now measured two.

“In the meantime, torrents of lava were pouring from all the crevasses

of the mountain down upon the plain, destroying houses, forests, and

crops. Some leagues from the volcano, on the seacoast, lies Catania, a

large town surrounded then by strong walls. Already the liquid fire had

devoured several villages, when the stream reached the walls of Catania

and spread over the country. There, as if to show its strength to the

terrified Catanians, it tore a hill away and transported it some

distance; it lifted in one mass a field planted with vines and let it

float for some time, until the green was reduced to charcoal and

disappeared. Finally, the fiery stream reached a wide and deep valley.

The Catanians believed themselves saved: no doubt the volcano would

exhaust its strength by the time it covered the vast basin which the

lava had just entered. But what an error of judgment! In the short space

of six hours, the valley was filled, and the lava, overflowing, advanced

straight toward the town in a stream half a league wide and ten meters

high. It would have been all over with Catania if, by the luckiest

chance, another current, whose direction crossed the first, had not come

and struck against the fiery flood and turned it from its course. The

stream, thus turned, coasted the ramparts of the town within

pistol-shot, and turned toward the sea.”

“I was very much afraid for those poor Catanians,” interposed Emile,

“when you spoke of that wall of fire, high as a house, going straight

toward the town.”

“All is not over yet,” his uncle proceeded. “The stream, I told you, was

going toward the sea. There was, then, a formidable battle between the

water and the fire. The lava presented a perpendicular front of 1500

meters in extent and a dozen meters high. At the touch of that burning

wall, which continued plunging further and further into the waves,

enormous masses of vapor rose with horrible hissings, darkened the sky

with their thick clouds, and fell in a salt rain over all the region. In

a few days the lava had made the limits of the shore recede three

hundred meters.

“In spite of that, Catania was still menaced. The stream, swollen with

new tributaries, grew from day to day and approached the town. From the

top of the walls the inhabitants followed with terror the implacable

progress of the scourge. The lava finally reached the ramparts. The

fiery flood rose slowly, but it rose ceaselessly; from hour to hour it

was found to have risen a little higher. It touched the top of the

walls, whereupon, yielding to the pressure, they were overthrown for the

length of forty meters, and the stream of fire penetrated the town.”

“My goodness!” cried Claire. “Those poor people are lost?”

“No, not the people, for lava runs very slowly, on account of its sticky

nature, and one can be warned in time; it was the town itself that ran

the greatest risk. The quarters invaded by the lava were the highest;

from there the current could spread everywhere. So Catania seemed

destined to total destruction, when it was saved by the courage of some

men who attempted to battle with the volcano. They bethought themselves

to construct stone walls, which, placed across the route of the

on-coming stream, would change its direction. This device partly

succeeded, but the following was the most efficacious. Lava streams

envelop themselves in a kind of solid sheath, embank themselves in a

canal formed of blocks coagulated and welded together. Under this

covering the melted matter preserves its fluidity and continues its

ravaging course. They thought, then, that by breaking these natural

dikes at a well-chosen spot, they would open to the lava a new route

across country and would thus turn it from the town. Followed by a

hundred alert and vigorous men, they attacked the stream, not far from

the volcano, with blows of iron bars. The heat was so great that each

worker could strike only two or three blows in succession, after which

he withdrew to recover his breath. However, they managed to make a

breach in the solid sheath, when, as they had foreseen, the lava flowed

through this opening. Catania was saved, not without great loss, for

already the lava flood had consumed, within the town walls, three

hundred houses and some palaces and churches. Outside of Catania, this

eruption, so sadly celebrated, covered from five to six square leagues

with a bed of lava in some places thirteen meters thick, and destroyed

the homes of twenty-seven thousand persons.”

“Without those brave men who did not hesitate, at the risk of being

burnt alive, to go and open a new passage for the stream of fire,

Catania would certainly have been lost,” remarked Jules.

“Catania would have been all burnt down, there is no doubt. To-day its

calcined ruins would be buried under a bed of cold lava, and there would

be nothing left but the name of the large town that had disappeared.

Three or four stout-hearted men revive the courage of the terrified

population; they hope that heaven will aid them in their devotion, and,

ready to sacrifice their lives, they prevent the frightful disaster. Ah!

may God give you grace, my dear child, to imitate them in the time of

danger; for, you see, if man is great through his intelligence, he is

still greater through his heart. In my old age, when I hear you spoken

of, I shall be more gladdened by the good you may have done than by the

knowledge you may have acquired. Knowledge, my little friend, is only a

better means of aiding others. Remember that well, and when you are a

man bear yourself in danger as did those of Catania. I ask it of you in

return for my love and my stories.”

Jules furtively wiped away a tear. His uncle perceived that he had sown

his word in good ground.

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The Story-book of Science · 第 46 / 80 章