Pump powered by men in a treadmill, 1556. Woodcut showing a rag-and-chain pump for draining a mine, powered by men walking a treadmill. From De re metallica (a work on mining and metallurgy) by Georgius Agricola, (Basle, 1556). | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Heritage Images / Ann Ronan Picture Library |
Bildgröße: | 3284 px × 5339 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |