First-order lever, very similar to lever inv. 1002. The apparatus consists of a profiled wooden base supporting a turned column that holds the moving beam. The latter has two notches for shifting the position of the fulcrum. One end of the beam carries a counterweight; the other end holds a cord to which a small weight is attached. The instrument reproduces a lever illustrated by Willem Jacob 's Gravesande in Physices elementa mathematica, experimentis confirmata (3rd ed., Leiden, 1742). Provenance: Lorraine collections.