GIA4715583: Scientific experiment: the calculation of the speed of sound, by Humboldt, Louis-Joseph Gay-Lussac (Louis Joseph Gay Lussac), Bouvard, Prony and Mathieu, which determine the time elapses between the perception of light and that of a gun shot, on the night of 22 June 1822, near Paris., Unknown Artist, (19th century) / Bridgeman Images
GIA4709784: Map of the Cisalpine Republic (Cisalpina) created by Napoleon Bonaparte on 27/06/1797 on the French model in Italy, which became the Italian Republic in 1802. The values of the French Republic are enshrined in it (Liberte, Egalite). Engraving Museo del risorgimento, Milan, Unknown Artist, (19th century) / Bridgeman Images