Safety lamp it. Air is drawn in and descends just inside the glass, passing up through the flame in the centre of the lamp. The outer casings of lamps have been made of brass or tinned steel. If a lamp bangs against a hard piece of rock a spark could be generated if iron or untinned steel were employed. Within months of Clanny's demonstration of his first lamp, two improved designs had been announced: one by George Stephenson, which later became the Geordie lamp, and the Davy lamp, invented by Sir Humphry Davy. Subsequently, Clanny incorporated aspects of both lamps and produced
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