The discharge of the Columbiad was accompanied by a veritable earthquake. Florida was shaken to its very depths. The gases of the powder, expanded by heat, forced back the atmospheric strata with tremendous violence, passing like a waterspout through the air. Not one spectator remained on his legs; men, women, and children were thrown down like ears of wheat in a storm; there was a terrible tumult, and a large number of people were seriously injured. J.T. Maston, who had very imprudently kept to the fore, was thrown twenty yards backwards like a bullet over the heads of his fellow-citizens. Three hundred thousand people were temporarily deafened and as though thunderstruck. The atmospheric current, after throwing over huts and cabins, uprooting trees within a radius of twenty miles, throwing the trains off the railway as far as Tampa, burst upon the town like an avalanche and destroyed a hundred houses, amongst others the church of St. Mary and the new edifice of the Exchange. Some of the vessels in the port were run against each other and sunk, and ten of them were stranded high and dry after breaking their chains like threads of cotton. But the circle of these devastations extended farther still, and beyond the limits of the United States. The recoil, aided by the westerly winds, was felt on the Atlantic at more than 300 miles from the American shores. An unexpected tempest, which even Admiral Fitzroy could not have foreseen, broke upon the ships with unheard-of violence. Several vessels, seized by a sort of whirlwind before they had time to furl their sails, were sunk, amongst others the _Childe Harold_, of Liverpool, a regrettable catastrophe which was the object of lively recriminations. Lastly--although the fact is not warranted except by the affirmation of a few natives--half-an-hour after the departure of the projectile the inhabitants of Sierra-Leone pretended that they heard a dull noise, the last displacement of the sonorous waves, which, after crossing the Atlantic, died away on the African coast. But to return to Florida. The tumult once lessened, the wounded and deaf--in short, all the crowd--rose and shouted in a sort of frenzy, "Hurrah for Ardan! Hurrah for Barbicane! Hurrah for Nicholl!" Several millions of men, nose in air, armed with telescopes and every species of field-glass, looked into space, forgetting contusions and feelings, in order to look at the projectile. But they sought in vain; it was not to be seen, and they resolved to await the telegrams from Long's Peak. The director of the Cambridge Observatory, M. Belfast, was at his post in the Rocky Mountains, and it was to this skilful and persevering astronomer that the observations had been entrusted. But an unforeseen phenomenon, against which nothing could be done, soon came to put public impatience to a rude test.