Museo Galileo
Virtual Museum
Cistern barometer
    • Setting:
      Room X
    • Maker:
      Nairne & Blunt firm
    • Place:
    • Date:
      ca. 1780
    • Materials:
      wood, glass, brass
    • Dimensions:
      height 1160 mm, width 150 mm
    • Inventory:
    • Cistern barometer (Inv. 3707)

Elegant cistern barometer mounted on a wooden base with glass windows. An ivory floating weight with reference index is inserted in the cistern; a screw underneath it adjusts the level of the mercury by acting on a leather membrane. The barometric scale, in English inches, is fitted with a vernier. There is also a mercury thermometer with a Fahrenheit scale and recording pointer, and an oat's-beard hygrometer calibrated by means of a handle. Made by Nairne & Blunt.