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re the Congress that the Creator has left no such flaw in His mechanism of the globe. The truth is, that molten lava can only rise about 21,000 feet above the level of the sea, owing to the balance-wheel of terrestrial gravitation, which counteracts at that height all centrifugal energy. Were this not so, the entire contents of the globe would gush from the incandescent center and fly off into surrounding space." M. Gassiot replied, "that true volcanoes were supplied by nature with _circumvalvular lips_, and hence, after filling their craters, they ceased to flow. But in the instance before us no such provision existed, and the only protection which he could conceive of consisted in the smallness of the orifice; and he would therefore recommend his Majesty King Leopold to direct all his efforts to confine the aperture to its present size." Palmieri again responded, "that he had no doubt but that the crater at Dudzeele would continue to flow until it had built up around itself basaltic walls to the height of many hundreds, perhaps thousands, of feet, and that the idea of setting bounds to the size of the mouth of the excavation was simply ridiculous." Gassiot interrupted, and was about to answer in a very excited tone, when Prof. Palmieri "disclaimed any intention of personal insult, but spoke from a scientific standpoint." He then proceeded: "The lava bed of Mount AEtna maintains a normal level of 7000 feet, while Vesuvius calmly reposes at a little more than one half that altitude. On the other hand, according to Prof. Whitney, of the Pacific Survey, Mount Kilauea, in the Sandwich Islands, bubbles up to the enormous height of 17,000 feet. It cannot be contended that the crater of Vesuvius is not a true nucleatic orifice, because I have demonstrated that the molten bed regularly rises and falls like the tides of the ocean when controlled by the moon." It was seen at once that the scientists present were totally unprepared to discuss the question in its novel and most important aspects; and on taking a vote, at the close of the session, the members were equally divided between the opinions of Gassiot and Palmieri. A further session will take place on the arrival of Prof. Tyndall, who has been telegraphed for from New York, and of the great Russian geologist and astronomer, Tugenieff. In conclusio
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