were recovered, it was discovered that a lamp was used in the pit that should not be used in gassy pits and that could ignite gas in the surrounding area).
y three Naylor lamps still approved for Officials use underground after the 1911 Mines & Quarries act wipe out of thousands of lamps deemed unfit for use (Photos Andy Jones)
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A Spiralarm „TYPE M“ was used for detecting explosive gas in the mine. The „TYPE S“ used in sewers.
In der Lampe befand sich ein Bimetalk