Filling a balloon with hydrogen gas Size:XS: 30 x 20cm Map of the ancient earthworks

Map of the ancient earthworks at Loughton Camp made around AD 52 in Epping Forest

View of Middle Row and Gray's Inn Lane

Figures are dwarfed by the size of the pillars

The scene is described below the image in English and French

Pictured with child actors Michael Brown 12 and Julien Tavener

Filling a balloon with hydrogen gas Size:XS: 30 x 20cm Map of the ancient earthworksScene showing the inflation of a balloon by hydrogen gas piped from a barrel. The gas was produced by the reaction of sulphuric acid and iron. A preliminary balloon of this type was flown at the Champ de Mars in Paris, France on the 27 August 1783 an event witnessed by Benjamin Franklin. Plate 3 from the book Description des expriences de la machine arostatiques de MM. de Montgolfier, by Faujas de Saint Fond (Paris, 1783). Inscribed below : 'Bertault