Geordie lamp the base so that it gave more light and tried new versions on 4 and 30 November. This was presented to the Literary and Philosophical Society (Lit & Phil) of Newcastle upon Tyne on 5 December 1815. Although controversy arose between Stephenson's design and the Davy lamp (invented by Humphry Davy in the same year), Stephenson's original design worked on significantly different principles from Davy's final design. If the lamp were sealed except for a restricted air ingress (and a suitably sized chimney) then the presence of dangerous amounts of firedamp in the incoming air would (by its combustion) reduce
Coal Miner (statue) was cast later, in 1966, and dedicated in 1967. Both statues were cast at the Spampinato Art Workshop foundry in Chicago. "The Coal Miner", which measures , is installed in the northwest corner of the Indiana Statehouse lawn and faces west. The figure wears overalls, boots, a belt, a long-sleeve shirt, and a miner's hat. He has a contrapposto stance with his proper left foot forward. He carries a miner's fire safety lamp, or "bug light", in his proper left hand, which is at his side. His proper right hand is raised, gripping the base of a miner's pick axe