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
History of Newcastle upon Tyne Tyneside, or more accurately Newcastle. Another theory, however, is that the name 'Geordie' came from the inventor of the Geordie lamp, George Stephenson. It was a type of safety lamp used in mining, but was not invented until 1815. Apparently the term 'German Geordie' was in common use during the 18th century. In 1771 a flood swept away much of the bridge at Newcastle. The bridge had been built in 1250 and repaired after a flood in 1339. The bridge supported various houses and three towers and an old chapel. A blue stone was placed in the middle of the