Museo Galileo
Virtual Museum
Cistern barometer
    • Setting:
      Room IX
    • Maker:
    • Date:
      second half 19th cent.
    • Materials:
      wood, brass, glass
    • Dimensions:
      height 1010 mm, width 168 mm
    • Inventory:
    • Cistern barometer (Inv. 1161)

Cistern barometer mounted on a wooden base. The mercury level is adjusted by means of a screw acting on the leather bottom of the cistern. The cistern is enclosed in a box placed at the base of the instrument. The barometric scale, fitted with a vernier, is divided into millimeters. There are three thermometers with centigrade scales: one is inserted into the cistern; a second, of the same shape, is partially immersed in the mercury at the top of the barometric tube; the third and largest is fixed to the wooden base.