Museo Galileo
Virtual Museum
Globe for experiments with bladders in vacuum
    • Setting:
      Room VIII
    • Maker:
    • Date:
      19th cent.
    • Materials:
      glass, brass
    • Dimensions:
      total length 325 mm, diameter 265 mm
    • Inventory:
    • Globe for experiments with bladders in vacuum (Inv. 358)

Glass globe with brass collar. Inside there is a bladder connected to the collar. Used to demonstrate the force of pressure. The globe would be connected to an air pump and evacuated, producing a partial vacuum. The bladder, which contained air, would expand. The first such experiment was developed in 1657 by the Accademia del Cimento, using a modified Torricellian barometric apparatus. Provenance: Lorraine collections.