Crushing gold bearing ores in mills similar in principle to flour mills, 1556. At bottom left goats in a treadmill produce horizontal power which is transferred to a mill (A) through a crown-and-pinion. At bottom right men turn a capstan and power is transferred through a tooth-and-pinion. From De re metallica by Georgius Agricola. (Basel, 1556). | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Heritage Images / Ann Ronan Picture Library |
Bildgröße: | 2496 px × 4194 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |