Pump mounted on an ornate mahogany frame. There are two barrels in which the rods move by means of iron racks operated by a crank with pinion. A lead tube connects the pump to the plate, which serves as the base for a bell-jar (replica). Resembles the pump described by Francis Hauksbee Senior in 1709. The innovative feature of Hauksbee's pump was the automatic evacuation of the air via a leather valve. In this model, instead, the valves are operated manually by means of a faucet. Provenance: Lorraine collections.