(zhôz f´ m sh l´ môNgôlfy ´) (KEY) , 1740–1810, and Jacques Étienne Montgolfier (zhäk ty n´) (KEY) , 1745–99, French inventors, brothers. Together they invented the first practical balloon. On June 5, 1783, they sent up at Annonay, near Lyons, a large linen bag inflated with hot air; its flight covered more than a mile and lasted 10 min. In the same year a Montgolfier balloon sailed over Paris in the first manned free balloon flight.
