Archipendulum

ETHICKS is represented in painting by a lady of a sober, grave aspect, holding the instrument archipendulum in one hand, with the other a lion bridled.

Alberti's equilibra, which he uses first for the levelling of water and later for the weighing of small objects, is really a makeshift archipendulum.

The altitude/angle of Polaris could be measured by either the cross-staff aboard a vessel at sea, or an archipendulum on shore at a stone circle megalith.