| 31. | Firedamp was collected in a gasometer from the upper workings and used to light the main roads underground.
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| 32. | It was liable to sudden inrushes of firedamp, sometimes sufficient to put out the Geordie lamps used.
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| 33. | Firedamp was ignited by an open acetylene cap lamp and the initial explosion started fires which spread rapidly.
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| 34. | Firedamp explosions can trigger the much more dangerous coal dust explosions, which can engulf an entire pit.
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| 35. | Firedamp explosions continued, often setting off coal dust explosions, so casualties grew during the entire 19th century.
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| 36. | Rescue parties explored number 3 pit as far as they could, but were limited by chokedamp and firedamp.
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| 37. | Firedamp explosions can trigger the much-more-dangerous coal dust explosions, which can engulf an entire pit.
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| 38. | Indeed, the lamp burns brighter in dangerous atmospheres thus acting as a warning to miners of rising firedamp levels.
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| 39. | Most of the deaths in coal mine disasters were caused by inhalation of the toxic gases produced by firedamp explosions.
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| 40. | It was caused by the ignition of coal dust following an explosion of firedamp, killed 290 men and boys.
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