Travels in the Air

aërial navigation aëronaut aërostat Albert Tissandier altitude anemometer appeared atmosphere ballast balloon ascents barometer beneath blue bulb Calais captive balloon carried caused Champ de Mars Chavoutier clouds cold colour course Coxwell Crystal Palace dark decrease descended dew-point direction distance Duruof earth effect elevation Entreprenant envelope excursion expedition experiments eyes Fahr fall feet high fell Fonvielle Gay-Lussac Godard ground guide-rope heard height higher regions horizontal hour hydrogen hygrometer immense inches increased inflated instruments journey layer light minutes past mist moisture moon morning motion mountains nearly Neptune night o'clock observations Observatory ocean Paris Paris Observatory passed Pilâtre de Rozier Place Vendôme rain rapid rapidly rays reached rise rope rose sailing seen shadow snow soar soon spectacle sunset surface temperature thermometer thick tint Tissandier travelling valve valve-rope vapour velocity Vincent Brooks voyage whilst wind wings Wolverhampton