Damp (mining)

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Historically, gases (other than breathable air) in coal mines in Britain were collectively known as "damps". This comes from the Middle Low German word dampf (meaning "vapour"), and was in use by 1480.[1]

Damps included:

The term damp also gives rise to damp sheet, a heavy curtain used to direct air currents and prevent the buildup of dangerous gases.

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