Description of Humphrey Davy's Safety Lamp

The final version of the lamp was wonderfully simple and surprisingly small. It was a standard uninsulated oil lamp, approximately sixteen inches high, with an adjustable cotton wick, enclosed in a tall column or ‘chimney’ of fine iron mesh. Astonishingly, the lamp required no other protection. In later models Davy added various improvements, largely designed to withstand rough use in the mine. Yet the fundamental notion that flame would not pass through gauze appeared so unlikely, so co...