At that time, five-sixths of the world's coal was mined and used in Britain. At the industry's peak in 1913, there were 3,024 deep mines in operation which produced 292 million tons of coal and employed 1.1 million miners. *...
At that time, five-sixths of the world's coal was mined and used in Britain. At the industry's peak in 1913, there were 3,024 deep mines in operation which produced 292 million tons of coal and employed 1.1 million miners. *...