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In page Davy lamp:
"The Regulation and Inspection of Mines Act of 1860 therefore required coal mines to have an adequate amount of ventilation, constantly produced, to dilute and render harmless noxious gases so that work areas were – under ordinary circumstances – in a fit state to be worked (areas where a normally safe atmosphere could not be ensured were to be fenced off "as far as possible"): it also required safety lamps to be examined and securely locked by a duly authorised person before use.[citation needed]
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