Furnaces at the zinc works, St Leonard, Liege, Belgium, 1855.
© Science Museum / Science & Society Picture Library
Lithograph by A Maugendre showing furnace workers wearing clogs. The zinc mine and foundry was owned by the Societe Anonyme de Mines et Fonderies de Zinc de la Vieille Montagne (Vieille Montagne zinc mine and foundry company). Illustration from Maugendre's 'Album des usines et etablisements de la societe', (Album of factories and premises of the company), published in Paris in 1855.