Nicolas-Jacques Conté, Robert de Launay, between 1800 and 1899
Nicolas-jacques conté (1755-1805), who experimented with the use of hydrogen for balloons. Date: between 1800 and 1899.
Author: Graveur: Robert de Launay (1749–1814) Dessinateur: After Adolphe Roehn (1780–1867)Source: https://commons.wikimedia.org/Loading...