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009593

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.

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Filename
009593.jpg
Copyright
Irish Photo Archive
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2445x2285 / 953.8KB
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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.