Scottish National Dictionary (1700–)
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First published 1952 (SND Vol. III).
This entry has not been updated since then but may contain minor corrections and revisions.
CUBICAL COAL, n. comb. (See quot.)Edb. 1845 Stat. Acc.2 I. 559:
The first principal one of these from the surface is the four-foot or cubical coal, which terminates about the centre of the parish [Newton], the greatest depth at which it has been found being about fifty yards in sinking.
