Safety lamp could create a sufficient updraft that firedamp would not penetrate down the chimney. Further observations of the speed of flame fronts in fissures and passageways led him to design a lamp with fine tubes admitting the air. Sir Humphry Davy was asked to consider the problems of a safety lamp following the Felling explosion. Previous experimenters had used coal gas (chiefly carbon monoxide) incorrectly, believing it to be the same as firedamp. Davy however performed his experiments with samples of firedamp collected from pits. As an experimental chemist, he was familiar with flames not passing through gauze; his experiments enabled
Tyneside form the separate Wearside conurbation, although the latter has a Newcastle Upon Tyne postcode. The people of the Tyneside area, called "Geordies", have a reputation for their distinctive dialect and accent. Tynesiders may have been given this name, a local diminutive of the name "George", because their miners used George Stephenson's safety lamp (invented in 1815 and called a "Georgie lamp") to prevent firedamp explosions, rather than the Davy lamp used elsewhere. An alternative explanation relates that during the Jacobite risings of 1715 and 1745 the Tynesiders declared their allegiance to the Hanoverian kings of Great Britain George I and