black scale

1) Probably a local spelling for black shale which could lie over a coal seam.

The term has been noted only in the Beeston colliery accounts, where it occurs in contexts that suggest it may have been rich enough in combustible material to be worked at a profit. In 1754, for example, miners were paid three shillings for driving 13 yards Black Scale .

places Beeston
sources Denison papers
dates 1754

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