Revolving wooden wind vanes fitted to the top
Revolving wooden wind vanes fitted to the top of mine ventilation shafts. When they revolved they acted as extractor fans sucking stale air from the mine. From De re metallica, by Agricola, pseudonym of Georg Bauer (Basle, 1556). Woodcut
Picture No
13901178
Media ID
48444874
Size
2445px x 2335px
(984KB)
Credit
World History Archive / Mary Evans Picture Library
Source
World History Archive





























