Scottish National Dictionary (1700–)
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First published 1976 (SND Vol. X, list of scientific terms with Scottish connections).
This entry has not been updated since then but may contain minor corrections and revisions.
BRUNTON, n. A small pocket-compass with sights and reflector attached, used in sketching mine-workings, invented by William Brunton (1777–1857), of Dalkeith, mechanical engineer.