Tracts on the Legislative Interference in Protecting The Lives and Health of the Miners Against Colliery Explosions and the Injuries Effects of Badly Ventilated Mines Newcastle Upon Tyne 1849-1850. Three pamphlets published in to express the concerns of miners safety. the three pamphlets are numbered 2, 3 and 4. Each goes into details of injuries and explosions that have occurred across the mining industry. Each is 8 sides and un-cut. Rare. 8 pages, complete in it's own right.