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Joseph-Michel Montgolfier (August 26, 1740 - June 26, 1810) and Jacques-Étienne Montgolfier (January 6, 1745 - August 2, 1799) were the inventors of the Montgolfière-style hot air balloon, globe aérostatique. It was Joseph who first contemplated building machines when he observed laundry drying over a fire incidentally form pockets that billowed upwards. He made his first definitive experiments in 1782. The brothers decided to make a public demonstration of a balloon in order to establish their claim to its invention. On June 4, 1783, they flew their craft in front of a group of dignitaries. Its flight covered 1.2mi, lasted 10 minutes, and had an estimated altitude of 5,200-6,600 ft. The brothers succeeded in launching the first manned ascent, when Étienne made a tethered flight on October 15, 1783. Later, in December 1783, in recognition of their achievement, their father Pierre was elevated to the nobility and the hereditary appellation of de Montgolfier by King Louis XVI of France....