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We had thus perpetual rupture and regelation; while the little sounds consequent upon rupture reinforced by the partial echoes from the surfaces of the granules, were blended together to a note resembling the lowing of cows.
Then again, what I have described as 'intrusive layers of blue ice' was a remarkable feature; one could imagine that these layers represent surfaces which have been transformed by regelation under hot sun and wind. This point required investigation. The second berg was distinguished by innumerable vertical cracks.
It is formed in water, and not from the cementing and regelation of the powdery crystalline snow, as is glacier ice.
Murray to help me in sending one to you which I hope you will honour by acceptance. There is nothing new in it, except a few additional pages about "regelation," and also "gravity."
"Has the theory of regelation been put to the proof?" asked Lewis, with a degree of interest in glaciers which he had never before felt. "It has," answered the Professor. "An experimentalist once cut a bar of solid ice, like to a bar of soap in form and size, from a glacier. To this an iron weight of several pounds was suspended by means of a very fine wire, which was tied round the bar.
Directing our steps southward toward a niche in the wall which bounded us only half a mile distant, we travelled over a continuous snow-field frozen so densely as scarcely to yield at all to our tread, at the same time compressing enough to make that crisp frosty sound which we all used to enjoy even before we knew from the books that it had something to do with the severe name of regelation.
These philosophers have discovered that when ice is subjected to great pressure it melts, and that, when the pressure is removed, the part so melted immediately freezes again hence the name regelation, or re-freezing, is given to the process.
The lightning was decreasing perceptibly, while the occasional peals of thunder were scarcely audible above the soughing of the wind. A tremendous crash on the right announced the fall of another avalanche; but it did not affect the next broad crevasse. The bridge they had used a few hours earlier stood firm. Indeed, it was new welded by regelation since the sun's rays had disappeared.
The surface yielded, and it seemed as if even that small weight would break the lump off, but the operation consolidated the mass in a few minutes, by reason of what the Professor termed "regelation." He then stepped tenderly on it, crossed over, and drew the rope after him. Antoine followed next, and in a few minutes the whole party was safe on the other side.
We should still have his researches on the Liquefaction of Gases; on Frictional Electricity; on the Electricity of the Gymnotus; on the source of Power in the Hydro-electric machine, the last two investigations being untouched in the foregoing memoir; on Electro-magnetic Rotations; on Regelation; all his more purely Chemical Researches, including his discovery of Benzol.
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