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A miners lamp was a lamp that could be safely used in an atmosphere potentially containing an explosive gas mixture, with no risk of triggering an explosion.

The English scientist Humphrey Davey noticed that if you passed a stream of gas through wire gauze, and then ignited it on one side of the gauze, the flame did not pass through to the other side. If the gas was lit on the side farthest from the gas jet, it never jumped through to the source of the gas.

Davey made an oil-lamp where the flame was surrounded by wire gauze. The lamp was lit well away from any area at risk of explosion. Any flammable gas that entered through the gauze could be seen burning, but the flame didn't spread outside.

The original lamp was a bit dim, so later models had the flame in a glass chimney. The air coming in from the mine and the carbon dioxide coming out each passed through a gauze barrier. The lamp was known as a Davey Lamp.

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