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
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