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A brattice is a partition used in an underground mine for directing air for ventilation. I have been unable to find a description of how they were made or what they were made from in the Middle Ages, but I think there might be one in a book called De re metallica by Georg Agricola, which was published in 1556. Most medieval mines were open pits until the Late Middle Ages, so the brattice would have been unusual before that time.

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15y ago

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