(other than air
) in coal mines
were collectively known as "damps"
. This comes from the Middle Low German
"), and was in use by 1480 .
- After damp, a mixture of gases (carbon monoxide, carbon dioxide, nitrogen and others) produced following explosions of firedamp or coal dust
- Black damp, stythe or choke damp, a suffocating mixture of nitrogen and carbon dioxide
- Fire damp, any mixture of flammable gases, principally methane
- Stink damp, usually hydrogen sulfide; toxic and explosive, but easily detectable by the smell
- White damp, carbon monoxide, highly dangerous due to being both toxic and explosive
The term damp also gives rise to damp#Derived terms, a heavy curtain used to direct air currents and prevent the buildup of dangerous gases.