Wells, canals and dams, 1819.
© Science Museum / Science & Society Picture Library
Engraving by Baltard, showing civil engineering works involving the movement of water, including the sinking of wells and the construction of dams, canals and reservoirs. Illustration from 'De la richese minerale: Considerations sur les mines, usines et salines des differens etats, presentees comparativement' by Antoine-Marie Heron de Villefose (1774-1852), published in Paris in 1819. In English, the title is 'Of mineral riches: Considerations on the mines, factories and salt-mines of different countries, presented comparatively'.