The eight-foot sandstone Davylamp was created in recognition of those who died at Bilsthorpe pit between 1927 and 1997.
BBC: Memorial unveiled to miners who died at Bilsthorpe pit
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Working together, the two developed the DavyLamp for miners.
ECONOMIST: Science
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The Davy safety lamp on which the sculpture is modelled was devised in 1815 by Sir Humphry Davy after a group of Newcastle miners told him of the dangers they faced from methane gas.
BBC: Memorial unveiled to miners who died at Bilsthorpe pit