Scarce ten months had elapsed since M. Montgolfier made his first aërostatic experiment, when M. Pilâtre de Rozier publicly offered himself to be the first adventurer in the newly invented aërial machine. His offer was accepted; his courage remained undaunted; and on October 15, 1783, he actually ascended, to the astonishment of a gazing multitude. The following are the particulars of this experiment:
"The accident which happened to the aërostatic machine at Versailles, and its imperfect construction, induced M. Montgolfier to construct another machine, of a larger size and more solid. With this intent, sufficient time was allowed for the work to be properly done; and by October 10th the aërostat was completed, in a garden in the Faubourg St.-Antoine. It had an oval shape; its diameter being about forty-eight feet, and its height about seventy-four. The outside was elegantly painted and decorated with the signs of the zodiac, with the cipher of the King's name in fleurs-de-lis, etc. The aperture or lower part of the machine had a wicker gallery about three feet broad, with a balustrade both within and without about three feet high. The inner diameter of this gallery, and of the aperture of the machine, the neck of which passed through it, was near sixteen feet. In the middle of this aperture an iron grate or brazier was supported by chains which came down from the sides of the machine.
"In this construction, when the machine was in the air, with a fire lighted in the grate, it was easy for a person who stood in the gallery, and had fuel with him, to keep up the fire in the mouth of the machine, by throwing the fuel on the grate through port-holes made in the neck of the machine. By this means it was expected, as indeed it was found by experience, that the machine might have been kept up as long as the person in its gallery thought proper, or while he had fuel to supply the fire with. The weight of this aërostat was upward of 16,000 pounds.
"On Wednesday, October 15th, this memorable experiment was performed. The fire being lighted, and the machine inflated, M. Pilâtre de Rozier placed himself in the gallery, and, after a few trials close to the ground, he desired to ascend to a great height; the machine was accordingly permitted to rise, and it ascended as high as the ropes, which were purposely placed to detain it, would allow, which was about eighty-four feet from the ground. There M. de Rozier kept the machine afloat during four minutes twenty-five seconds, by throwing straw and wool into the grate to keep up the fire; then the machine descended very gently; but such was its tendency to ascend, that after touching the ground, the moment M. de Rozier came out of the gallery, it rebounded again to a considerable height. The intrepid adventurer, returning from the sky, assured his friends, and the multitude that gazed on him with admiration, with wonder, and with fear, that he had not experienced the least inconvenience, either in going up, in remaining there, or in descending; no giddiness, no incommoding motion, no shock whatever. He received the compliments due to his courage and audacity, having shown the world the accomplishment of that which had been for ages desired, but attempted in vain.
"On October 17th, M. Pilâtre de Rozier repeated the experiment with nearly the same success as he had two days before. The machine was elevated to about the same height, being still detained by ropes; but the wind being strong, it did not sustain itself so well, and consequently did not afford so fine a spectacle to the concourse of people, which at this time was much greater than at the preceding experiment.
"On the Sunday following, which was the 19th, the weather proving favorable, M. Montgolfier employed his machine to make the following experiments. At half past four o'clock the machine was filled, in five minutes' time; then M. Pilâtre de Rozier placed himself in the gallery, a counterpoise of 100 pounds being put in the opposite side of it, to preserve the balance. The size of the gallery had now been diminished. The machine was permitted to ascend to the height of about 210 feet, where it remained during six minutes, not having any fire in the grate; and then it descended very gently.
"Soon after, everything remaining as before, except that now a fire was put into the grate, the machine was permitted to ascend to about 262 feet, where it remained stationary during eight minutes and a half. On pulling it down, a gust of wind carried it over some large trees in an adjoining garden, where it would have been in great danger had not M. de Rozier, with great presence of mind and address, increased the fire by throwing some straw upon it; by which means the machine was extricated from so dangerous a situation, and rose majestically to its former situation, among the acclamations of the spectators. On descending, M. de Rozier threw some straw upon the fire, which made the machine ascend once more, remaining up for about the same length of time.
"This experiment showed that the aërostat may be made to ascend and descend at the pleasure of those who are in it; to effect which, they have nothing more to do than to increase or diminish the fire in the grate; which was an important point in the subject of aërostation.
"After this, the machine was raised again with two persons in its gallery, M. Pilâtre de Rozier and M. Girond de Villette, the latter of whom was therefore the second aërostatic adventurer. The machine ascended to the height of about 300 feet, where it remained perfectly steady for at least nine minutes, hovering over Paris, in sight of its numerous inhabitants, many of whom could plainly distinguish, through telescopes, the aërostatic adventurers, and especially M. de Rozier, who was busy in managing the fire. When the machine came down, the Marquis d'Arlandes, a major of infantry, took the place of M. Villette, and the balloon was sent up once more. This last experiment was attended with the same success as the preceding; which proved that the persons who ascended with the machine did not suffer the least inconvenience, owing to the gradual and gentle ascent and descent of the machine, and to its steadiness or equilibrium while it remained in the air.
"If we consider for a moment the sensation which these first aërial adventurers must have felt in their exalted situation, we can almost feel the contagion of their thrilling experience ourselves. Imagine a man elevated to such a height, into immense space, by means altogether new, viewing under his feet, like a map, a vast tract of country, with one of the greatest existing cities—the streets and environs of which were crowded with spectators—attentive to him alone, and all expressing in every possible manner their amazement and anxiety. Reflect on the prospect, the encomiums, and the consequences; then see if your mind remains in a state of quiet indifference.