Details
A mid 18th-Century Davis quadrant (back-staff)
constructed in lignum vitae with box wood arcs (lacking vanes), the small arc divided 0-65°, the great arc divided 0-25° & 65-90°, the frame with space for makers plaque (missing), radius -- 24in. (61cm.)
See illustration
constructed in lignum vitae with box wood arcs (lacking vanes), the small arc divided 0-65°, the great arc divided 0-25° & 65-90°, the frame with space for makers plaque (missing), radius -- 24in. (61cm.)
See illustration