Museo Galileo
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Virtual Museum
Hair hygrometer
    • Setting:
      Room XV
    • Maker:
      unknown
    • Place:
      Italian
    • Date:
      ca. 1850
    • Materials:
      slate, brass
    • Dimensions:
      337x97x50mm
    • Inventory:
      2032
    • Hair hygrometer (Inv. 2032)
    • Hair hygrometer (Inv. 2032)

This hygrometer consists of a plate of slate with three small feet. Under the plate is a bundle of hair, used as hygroscopic substance The hair is attached to a pulley kept taut by a spring. The pulley is integral with a pointer pivoting at the center of a semicircular scale placed on the instrument.