[AEROMETRY]. Westphalian balance. Set of 3 pieces. Brass, maximum height 32 cm. Instrument from Sartorius Werke which accurately measures the density of a liquid. Accompanied by a thermal plunger, a glass container and a set of riders, all in its storage box. Early 20th century. Two Baroscopes are included. H: 24 cm. One glass sphere, the other plastic. Didactic instrument demonstrating Archimedes' thrust. Provenance: José Henry collection.