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Vessels coming from Zeeland or Antwerp, and the floating ice-masses, which were almost as formidable, were obliged to make their first attack upon these dangerous outer defences. Each raft; floating in the middle of the stream, extended twelve hundred, and fifty-two feet across, thus protecting the whole of the bridge of boats and a portion of that resting upon piles.
Opening my case of instruments, I took out my petrochronologue and applied it to the worn and scratched surface of the rock. The indicator at once pointed to K 59 xpc ½! At this astonishing result I was nearly overcome by excitement: the last erosions of the ice-masses upon this vestige of a stupendous mountain range which they had worn away, had been made as recently as the year 1945!
Observe, we do not say that they are merely covered over with ice; they are absolutely filled up with it from top to bottom. Those ice-masses are known by the name of glaciers; and they are found in most of the elevated regions of the Earth, on the Alps and the mountains of Norway, for instance, but they exist in greater abundance about the poles than elsewhere. Glaciers never melt.
During the remaining days of August the ship struggled, almost like a living creature, with the perils that, beset her; now rearing in the air, her bows propped upon mighty blocks, till she absolutely sat erect upon her stern, now lying prostrate on her side, and anon righting again as the ice-masses would for a moment float away and leave her breathing space and room to move in.
Large cakes and masses of ice came floating down the current, which, though not very violent, hurried along at a much swifter pace than the ordinary one of our sluggish river-god. These ice-masses, when they struck the barrier of ice above mentioned, acted upon it like a battering-ram, and were themselves forced high out of the water, or sometimes carried beneath the main sheet of ice.
On the 3rd of August the brig confronted immoveable and united ice-masses. The passages were seldom more than a cable's length in width, and the ship was forced to make many turnings, which sometimes placed her heading the wind.
Now at the North Pole there seem to be causes at work to counterbalance the effect of the internal heat, chiefly in the enormous accumulation of polar ice which probably hems it in on every side; and though many believe in an open polar sea of warm water at the North Pole, yet still the effect of vast ice-masses and of cold submarine currents must be to render the climate severe.
Vessels coming from Zeeland or Antwerp, and the floating ice-masses, which were almost as formidable, were obliged to make their first attack upon these dangerous outer defences. Each raft; floating in the middle of the stream, extended twelve hundred, and fifty-two feet across, thus protecting the whole of the bridge of boats and a portion of that resting upon piles.
The southern pack and bergs, catching the sun's rays, are golden, but to the north the ice-masses are purple. Here the bergs assume changing forms, first a castle, then a balloon just clear of the horizon, that changes swiftly into an immense mushroom, a mosque, or a cathedral.
Temporary causes, however, such as heavy falls of snow or rain limited to one continental area, the shifting of ice-masses, even the movements of winds, may render the globe slightly lop-sided, and thus oblige it to forsake its normal axis, and rotate on one somewhat divergent from it. Provided, that is to say, the earth were a perfectly rigid body.