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| | history of balloon flying |
 | | In the mid-1770s, Joseph and Etienne Montgolfier, brothers who worked in their father’s paper factory in Annonay in southeastern France, noted that paper rose in the updrafts of the factory’s chimney, and occasionally a sheet would fold into a dome and continue rising even after leaving the immediate area of the chimney. |
 | | They believed that the balloon was filled with a gas they called “Montgolfier gas” that had a special property they called “levity.” They did not even associate heated air with Montgolfier gas—they believed that the levity was contained in the smoke. |
 | | Even before Etienne arrived, the French physicist Jacques Charles, mistakenly believing the Montgolfiers had used hydrogen in their ascent, hastily constructed a balloon of varnished silk, filled it with hydrogen (an expensive chemical procedure on such a large scale), and launched it from the Champs de Mars, Paris, on August 27. |
| www.start-flying.com /Montgolfier.htm (943 words) |
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