rose majestically from its summit. Dull detonations are heard every now and then, and the enormous jet, taken as it were with sudden fury, shakes its plume of vapor, and bounds into the first layer of the clouds. It is alone. Neither spurts of vapor nor hot springs surround it, and the whole volcanic power of that region is concentrated in one sublime column. The rays of electric light mix with this dazzling sheaf, every drop as it falls assuming the prismatic colors of the rainbow.
"Let us go on shore," said the Professor, after some minutes of silence. It was necessary, however, to take great precaution, in order to avoid the weight of falling waters, which would cause the raft to founder in an instant. Hans, however, steered admirably, and brought us to the other extremity of the island.
I was the first to leap on the rock. My uncle followed, while the eider-duck hunter remained still, like a man above any childish sources of astonishment. We were now walking on granite mixed with silicious sandstone; the soil shivered under our feet like the sides of boilers in which over-heated steam is forcibly confined. It was burning. We soon came in sight of the little central basin from which rose the geyser. I plunged a thermometer into the water which ran bubbling from the center, and it marked a heat of a hundred and sixty-three degrees! This water, therefore, came from some place where the heat was intense. This was singularly in contradiction with the theories of Professor Hardwigg. I could not help telling him my opinion on the subject.
"Well," said he sharply, "and what does this prove against my doctrine?"
"Nothing," replied I dryly, seeing that I was running my head against a foregone conclusion. I am compelled to confess that until now we have been most remarkably fortunate, and that this voyage is being accomplished in most favorable conditions of temperature; but it appears evident, in fact, certain, that we shall sooner or later arrive at one of those regions, where the central heat will reach its utmost limits, and will go far beyond all the possible gradations of thermometers. Visions of the Hades of the ancients, believed to be in the center of the earth, floated through my imagination.
