1) Methane
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https://www.crosswordclues.com/clue/firedamp
1) The explosive mixture itself
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https://www.crosswordclues.com/clue/firedamp
Firedamp is flammable gas found in coal mines. It is the name given to a number of flammable gases, especially methane. It is particularly commonly found in areas where the coal is bituminous. The gas accumulates in pockets in the coal and adjacent strata, and when they are penetrated, the release can trigger explosions. Historically, if such a po...
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http://en.wikipedia.org/wiki/Firedamp
(from the article `mine gas`) any of various harmful vapours produced during mining operations. The gases are frequently called damps (German Dampf, `vapour`). Firedamp is a gas ... colourless, odourless gas that occurs abundantly in nature as the chief constituent of natural gas, as a component of firedamp in coal mines, and...
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http://www.britannica.com/eb/a-z/f/28
A mix of potentially explosive gases found underground. Such a mixture contained Methane (CH4) which would explode if ignited by a spark. The miner's safety lamp, (see Stephenson, George), was to provide light shielded from the gas so as to stop any explosions. Prior to this firedamp had been ignited in several collieries with attendant injuries an...
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http://www.encyclo.co.uk/local/20766
Methane or other light hydrocarbons forming an explosive mixture when mixed with 7 or 8 volumes of air. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973
Type: Term Pronunciation: fīr′damp Definitions: 1. Methane or other light hydrocarbons forming an explosive mixture when mixed with 7 or 8 volumes of air.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=33456
Firedamp is the name given by miners to the explosive mixture of the hydrocarbon methane with air, which sometimes occurs in coal-mines.
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http://www.probertencyclopaedia.com/browse/GF.HTM
[
n] - a mixture of gases (mostly methane) that form in coal mines and become explosive when mixed with air
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http://www.webdictionary.co.uk/definition.php?query=firedamp
Gas that occurs in coal mines and is explosive when mixed with air in certain proportions. It consists chiefly of methane (CH
4, natural gas or marsh gas) but always contains small quantities of other gases, such as nitrogen, carbon dioxide, and hydrogen, and sometimes ethane and carbon monoxide
Found on
https://www.encyclo.co.uk/local/21221
a combustible gas consisting chiefly of methane, formed esp. in coal mines, and dangerously explosive when mixed with certain proportions of atmospheric air. · the explosive mixture itself.
Found on
https://www.infoplease.com/dictionary/firedamp
No exact match found.
