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Twin-barrel air pump
    • Setting:
      Room XI
    • Maker:
      unknown
    • Date:
      1743
    • Materials:
      mahogany, brass, iron, lead, glass
    • Dimensions:
      total height 1700 mm, base 590x600 mm
    • Inventory:
      1533
    • Twin-barrel air pump (Inv. 1533)

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.

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