Mine ventilation shaft topped with a device to
Mine ventilation shaft topped with a device to extract the stale air from the mine. H is a vane to make the barrel revolve so that is always facing in the optimum wind direction. From De re metallica, by Agricola, pseudonym of Georg Bauer (Basle, 1556). Woodcut
Picture No
13901179
Media ID
48377522
Size
2445px x 2285px
(979KB)
Credit
World History Archive / Mary Evans Picture Library
Source
World History Archive





























