| 11. | The cause was assumed to have been the ignition of firedamp by a safety lamp.
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| 12. | Such towers and the conductors they carry must be equipped with flight safety lamps and reflectors.
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| 13. | It was a type of safety lamp used in mining, but was not invented until 1815.
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| 14. | The committee secured the services of Sir Humphry Davy, inventor of the safety lamp, in 1815.
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| 15. | Safety lamps had been ordered for the mine and a barometer had been provided to Hodge.
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| 16. | In January 1879 safety lamps had been ordered.
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| 17. | Sir Humphry Davy was asked to consider the problems of a safety lamp following the Felling explosion.
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| 18. | Improvements made to Calumet Mine in 1910 were : 230 Wolfe safety lamps and equipment were renewed.
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| 19. | Both of these practices were strictly forbidden; they clearly negated the whole point of the safety lamp.
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| 20. | Subsequently, Clanny incorporated aspects of both lamps and produced the ancestor of all modern oil safety lamps.
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