This first ascent in Paris was an important event. Every one, from the smallest to the greatest, was deeply interested in it, while to the man of science it was one of the most exciting of incidents. For the purpose of observing the altitude to which the balloon rose, and the course it took, Le Gentil was on the observatory, Prevost was on one of the towers of Notre Dame, Jeaurat was on La Place Louis XV., and d’Agelet was on the Champ de Mars. It was only Lalande that frowned as he witnessed the success of the experiment. He had predicted the year before that air-navigation was impossible. Chapter VI. Third Experiment. (Montgolfier’s Balloon, Paris, Faubourg St. Antoine.) As we have seen, the triumph of aerostation was sudden and complete. The young Montgolfier had arrived in Paris prior to the experiment of the 27th of August, and was present as a simple spectator on that occasion. immediately afterwards he set to work upon a balloon, which was to be made use of when the Academy should investigate the phenomenon at Versailles in presence of the king, Louis XVI. It was at this time (September, 1783) that those small balloons, made of gold-beaters’ skin, which are used as children’s toys to the present day, were first made. The whole of Paris amused itself with them, repeating in little the phenomenon of the great ascent. The sky of the capital found itself all at once traversed by a multitude of small rosy clouds, formed by the hand of man. Faujas de Saint Fond says that at first an attempt was made to construct balloons of fine, light paper; but this material being permeable, and the gas being inflammable, balloons thus made did not succeed. It was necessary to seek a material less porous, and, if possible, still lighter. The Journal de Paris, of the 11th of September, 1783, informed the public that the Baron de Beaumanoir, “who cultivated the sciences and the fine arts with as much success as zeal,” would send up a balloon eighteen inches in diameter. At noon of the same day he made this experiment in presence of a numerous assembly in the garden in front of the Hotel de Surgeres.. The little balloon mounted freely, but was held in, like a kite, by means of a silk thread. In the course of the same afternoon, the baron took down the balloon and filled it anew with hydrogen, and then let it off. The spectators had the pleasure of seeing it rise to a great height, and pass away in the direction of Neuilly, and it is said to have been found at a distance of several leagues, by peasants.