History of chemistry iodine first, but both scientists acknowledged Courtois as the first to isolate the element. In 1815, Humphry Davy invented the Davy lamp, which allowed miners within coal mines to work safely in the presence of flammable gases. There had been many mining explosions caused by firedamp or methane often ignited by open flames of the lamps then used by miners. Davy conceived of using an iron gauze to enclose a lamp's flame, and so prevent the methane burning inside the lamp from passing out to the general atmosphere. Although the idea of the safety lamp had already been demonstrated by
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