This multiple apparatus, built by Nairne & Blunt, is equipped with several simple demonstration machines. It is designated in the old inventories as "astuccio di Nairne" [Nairne's kit].
The round wooden base holds a columns with two arms. A small triangular inclined plane with a pulley is fixed to the end of one arm. The angle formed by the inclined plane with the horizontal is adjusted by means of a brass arc and a fastening screw. The second arm carries a brass frame that houses an axle fitted with an endless screw and a disk. A series of concentric holes are drilled along one of the disk's diameters, to which the weights can be applied by means of the cords. The screw meshes with a cogwheel whose axle carries a pulley bearing a weight hanging from a cord. Four pulley systems are fastened to the underside of the same arm: a fixed sheave, a two-sheave block, a four-sheave block, and a six-sheave block, to which different weights are applied. Provenance: Lorraine collections.