Gretna Green the marriage ceremony. The blacksmiths in Gretna became known as "anvil priests", culminating with Richard Rennison, who performed 5,147 ceremonies. The local blacksmith and his anvil became lasting symbols of Gretna Green weddings. Two in particular, The Old Blacksmith's Shop, built around 1712, and Gretna Hall Blacksmith's Shop (1710) became, in popular folklore at least, the focal tourist points for the marriage trade. The Old Blacksmith's Shop opened to the public as a visitor attraction as early as 1887. Victorian chronicler Robert Smith Surtees described Gretna Green at length in his 1848 "New Monthly Magazine" serial, "The Richest Commoner in
Thermal runaway have led to catastrophic explosions when reaction control failed. Thermal runaway may result from unwanted exothermic side reaction(s) that begin at higher temperatures, following an initial accidental overheating of the reaction mixture. This scenario was behind the Seveso disaster, where thermal runaway heated a reaction to temperatures such that in addition to the intended 2,4,5-trichlorophenol, poisonous 2,3,7,8-tetrachlorodibenzo-p-dioxin was also produced, and was vented into the environment after the reactor's rupture disk burst. Thermal runaway is most often caused by failure of the reactor vessel's cooling system. Failure of the mixer can result in localized heating, which initiates thermal runaway. Similarly,