Details
A brass circumferentor
by Heath & Wing, London, the compass box with engraved silvered-dial, steel needle and spirit-level, the circle divided 10°-360°, the alidade with twin verniers, on staff mount -- 10in.(25cm.)diam.(lacking sights), in fitted mahogany case, circa 1765
by Heath & Wing, London, the compass box with engraved silvered-dial, steel needle and spirit-level, the circle divided 10°-360°, the alidade with twin verniers, on staff mount -- 10in.(25cm.)diam.(lacking sights), in fitted mahogany case, circa 1765
Further details
See colour plate