Mine ventilation. Hollow wooden drum, top, which had two blowholes opposite each other on the circumference, C, one to suck in air and one to expel it as the drum rotated. Inside the drum, fixed to axle on which it rotated, were fans made of wood or of wood and goose quills. HHHH are rods attached t

Mine ventilation. Hollow wooden drum, top, which had two blowholes opposite each other on the circumference, C, one to suck in air and one to expel it as the drum rotated. Inside the drum, fixed to axle on which it rotated, were fans made of wood or of wood and goose quills. HHHH are rods attached t
SuperStock offers millions of photos, videos, and stock assets to creatives around the world. This image of Mine ventilation. Hollow wooden drum, top, which had two blowholes opposite each other on the circumference, C, one to suck in air and one to expel it as the drum rotated. Inside the drum, fixed to axle on which it rotated, were fans made of wood or of wood and goose quills. HHHH are rods attached t by Image Asset Management/World History Archive is available for licensing today.
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DETAILS
Image Number: 1746-1929Rights ManagedCredit Line:Image Asset Management/World History Archive/SuperStockCollection:Image Asset ManagementModel Release:NoProperty Release:NoResolution:3388×5705
16th Century
adults only|
art|
Aug07|
black and white|
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