Tarenni Colliery 1858, when the Primrose Colliery was owned by Morgan and Lewis, fumes of an engine boiler suffocated 14 men and boys, and 7 horses. According to HM Inspectorate of Mines and Quarries data, outside the Gwendraeth valley, Tarenni Colliery had the highest set of recorded incidents for coal damp and methane gas explosions. In total during its production lifetime, there were six outbursts in which three men lost their lives: one on 12 December 1914; two on 17 February 1941. On 1 November 1909, water from the abandoned Ynysgeinon pit caused the death of five miners at Tarenni No.2. On
Lighting in libraries were too unstable; open flamed lighting was just too risky because of the fire implications. Books could not be near open flames, since one accident could destroy the whole building, and its collection. There was gaslight technology available, though, before electricity came around. It created light in dark spaces, but it was not a stable source. The issue of carbon dioxide poisoning, since its light was fed by natural gas to keep it running, was a huge problem. The issue of intoxication by gas, and the instability of the gas (which could result in explosions), led to the popularization of