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Details
An 18th-Century brass surveying graphometer,
signed on the silvered dial Willm. King Dublin Fecit, the compass with blued-iron edge-bar needle, well engraved surface and needle stop, the frame with finely divided scales, the alidade and base line with sights secured by butterfly screws, each appropriately numbered, with staff mounting -- 15in. (40cm.) wide
See Front Cover
signed on the silvered dial Willm. King Dublin Fecit, the compass with blued-iron edge-bar needle, well engraved surface and needle stop, the frame with finely divided scales, the alidade and base line with sights secured by butterfly screws, each appropriately numbered, with staff mounting -- 15in. (40cm.) wide
See Front Cover