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009625

Plough used to deepen navigable rivers and canals. Man in boat exerted pressure on lever B, in order to keep plough on canal bed. From 'Architecture Hydraulique' Bernard Forest de Belidor (Paris, 1737). Copperplate engraving

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009625.jpg
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Irish Photo Archive
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3180x1708 / 761.6KB
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Plough used to deepen navigable rivers and canals. Man in boat exerted pressure on lever B, in order to keep plough  on canal bed. From 'Architecture Hydraulique' Bernard Forest de Belidor (Paris, 1737). Copperplate engraving