About the middle of November, 1782, they made their first experiment in their own chamber at Avignon, with a light paper bag of an oblong shape, which they inflated, by applying burning paper to an orifice in the lower part of the bag, and in a few minutes they had the satisfaction of seeing it ascend to the ceiling of the chamber. Constructing a paper bag of larger dimensions, they made a similar experiment in the open air, with equal success, and, the bag being of a spherical shape, they gave it the name of balloon, from its resemblance to a large, round, short-necked, chemical vessel so called. Finding, from repeated trials, that the larger the balloon the more successful was the experiment, they proceeded to construct one of linen lined with paper, 35 feet in diameter; and, on the 25th of April, 1783, after being filled with rarified air, it rapidly rose to the height of 1000 feet, and fell to the ground at the distance of three-quarters of a mile from the spot where it ascended. Encouraged by this success, the Montgolfiers came to the resolution of making a public experiment with this last constructed balloon at Annonay, on the 5th of June following. It was inflated with heated air, by the lower orifice being placed over a pit or well, in which were burned chopped straw and wool. Two men were sufficient to fill it; but, when fully inflated, eight men were required to prevent it from ascending. On being released from its fastenings, it rose majestically to the height of six or seven thousand feet, and made its descent at the distance of a mile and a half from the point of its departure.