Pittsburgh Fifty Years Ago from the Saltworks on Sawmill River.
Model of washing and drying of fabrics.
Model of water mill-hydraulic engine at Bar Iqal.
Model of bridge of boats (pontoon bridge) over the Rhone during the late Roman e
Model of hoist powered by people.
Model of water wheel.
The Mills of Verona. Detail.
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Last updated: 03/02/2021