| 21. | The Colliery Owners followed the recommendations of the inquest and issued miners with Routledge Newcastle safety lamps.
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| 22. | One of the survivors, Peter Gibbon, saw from his safety lamp that the air quality had changed.
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| 23. | The lower levels of light associated with safety lamps caused an increase in the incidence of nystagmus.
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| 24. | He also invented the first form of'Safety Lamp', it was called the Spedding Wheel or Steel Mill.
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| 25. | Hodge had taken quite a casual attitude to it and Holmes had asked him to institute safety lamps.
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| 26. | It is replacing conventional safety lamps.
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| 27. | An explosion of firedamp, ignited by a safety lamp, in 1858 cost the lives of 25 men and boys.
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| 28. | Rather than the Davy lamp, Tyneside miners used the Geordie lamp, a similar safety lamp designed by George Stephenson.
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| 29. | In 1833 a House of Commons committee found that Stephenson had equal claim to having invented the safety lamp.
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| 30. | These structures have to be marked with red and white paint, have flight safety lamps on top, or both.
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