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Italian military hydrogen balloon. Italian military balloon with hydrogen gas. The captive (tethered) balloon (top right) is being used to observe enemy positions in a campaign during the First Italo-Ethiopian War (1895-1896) in Ethiopia (then known as Abyssinia). The launch area is shown, as is the horse-drawn cart and winch to which it is tethered. The steel tubes contain hydrogen gas at a pressure of 35 atmospheres. Artwork from 'Aerostation - Aviation' (1911) by French civil engineer Max de Nansouty (1854-1913), part of the 'Les merveilles de la science' series of 1867-1891 by Louis Figuier.
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