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people in they office were enspired by coal miners
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a new smockless field of coal
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mary harris leads a march of miners
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There were 65,000 pit ponies employed underground.
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The safety helmet was introduced to coal mining.
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Opencast mining was increased to assist war effort.
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By this date 72% of the annual were output of coal.
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The national output of coal was estimated at 204,000,000 tones.
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In this period 34 coal pits were closed down.
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The number of pits had been reduced until just 50 pits were open
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