On 4 March 2012 10:50, Paul Olivier <[email protected]> wrote: > > I wonder how >> this sits compared with the wire gauze in a Davey Safety lamp, which >> is there specifically to remove the source of ignition from the gases >> outside? >> > > Again, I do not understand your point. > Please clarify. > So sorry >
Paul, A classic demonstration of the effects of a metal gauze on combustion gases is shown in first year senior school in the UK at least. A gauze is placed over an unlit bunsen burner and then the gas emitted through the gauze is lit. Likewise, you can show that you can light the gas beneath the gauze, and have no flame above it. As Andrew comments, this was the basis of the "Davy Lamp" in mine for over 150 years. Steve
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