In the United States, many aerial voyages have been performed. The first of these was made by a Frenchman, M. Blanchard, in Jan., 1793, from Philadelphia, at which General Washington was a spectator. Gillio and Robertson, both Europeans, were the next after Blanchard. No Americans were engaged in the business until Mr. Durant, an ingenious citizen of New York, took it up after Robertson. He made a number of aerial excursions, and was shortly followed by new adventurers in the art, among whom the most celebrated is Mr. Wise, a piano-forte maker in Philadelphia, who in 1835 betook himself to the trade of ascending in balloons, and who up to this date has made upward of a hundred ascents. Mr. Wise is entitled to the merit of having carefully studied and mastered the scientific principles of aeronautics, and he is among the most enthusiastic of his profession. While admitting that the art has advanced but little since its first discovery, compared with other sciences, he anticipates from it, if perseveringly cultivated by men of genius, the most splendid results, adopting, as the motto on the title-page of his work, the couplet from Shakspeare: "There are more things in heaven and earth, Horatio, Than are dreamt of in your philosophy." Some of his feats have been daring enough, and others still more perilous he is willing to undertake. Not long after commencing the practice of his new profession, Mr. Wise resolved to test the practicability of descending in safety with the balloon, after it had burst, at the elevation of a mile or two. It would then, he conceived, form a parachute, and, from the resistance it would meet with from the atmosphere in its descent, would gently let him down to the earth. Having prepared a balloon of cambric muslin, which he coated with his newly-invented varnish, he ascended, as had been advertised, from Easton, in Pennsylvania, on the 11th of August, 1838, at a few minutes before two o'clock, afternoon, with the full determination of making the experiment, though he had concealed his intention both from the public and from his personal friends. He carried up with him two parachutes, the one containing a cat, and the other a dog. As the balloon approached a dense body of black thunder-clouds, some vivid flashes of lightning, accompanied by violent peals of thunder, greeted his upward course. This gave the first part of his voyage a terrific but grand and imposing appearance. It seemed to him as if heaven's artillery were celebrating these efforts of the new-born science, and, acting on his imagination, this inspired him with a fresh determination to explode the balloon. At different elevations, he detached first one and then another of the parachutes, with their occupants, which landed in safety. At the altitude of about 13,000 feet, the gas became expanded to its utmost tension, and the balloon was still rising, making it evident that, unless the safety-valve were speedily