Museo Galileo
Virtual Museum
Siphon and cistern barometer
    • Setting:
      Room XV
    • Maker:
    • Date:
      mid-19th cent.
    • Materials:
    • Dimensions:
      height 1055 mm
    • Inventory:
    • Siphon and cistern barometer (Inv. 1132)

Siphon and cistern barometer mounted on a tripod with leveling screws. The cistern has a screw that, acting on its leather bottom, adjusts the level of the mercury in a small tube forming the shorter arm of the siphon. The barometric tube is enclosed in a brass tube with windows for reading the mercury level. The brass tube is engraved with four different barometric scales. The readings are taken with a vernier. A mercury thermometer with centigrade and Réaumur scales is also fixed on the brass tube.