11. Firedamp is all the more hazardous because of the after effects of the explosion.12. Methane is the main gas present in firedamp . 13. Coal mining was very dangerous owing to the presence of firedamp in many coal seams. 14. Firedamp was ignited when being tested for with a Clanny lamp having a cracked glass.15. It is thought the explosion was caused by firedamp igniting on contact with a candle. 16. A disaster in May 1924 when firedamp ignited killed five miners and injured 26 men. 17. The cause was an explosion of firedamp ignited by sparks from a damaged trailing cable. 18. Back in London Davy worked with Michael Faraday and identified " firedamp " as methane. 19. The cause was assumed to have been the ignition of firedamp by a safety lamp. 20. In addition, the shaft provided vitally important fresh air ventilation and extraction of the firedamp .
