I have recently come across a reference to 'Hepple and Cranston's coal cutting machines' being used at the Dorothea Pit, one of the Lambton collieries in the then County Durham, now Tyne & Wear. Unfortunately there is no date on the reference and all I know is that it was after 1878.
Does any list member have any information on these coal cutting machines.
Alan Vickers.
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