Museo Galileo
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Virtual Museum
Portable plate electrical machine
    • Setting:
      Room XI
    • Maker:
      unknown
    • Date:
      ca. 1775
    • Materials:
      wood, brass, glass, black velvet
    • Dimensions:
      total height 460 mm, base (excluding conductor) 325x140 mm, glass disk diameter 330 mm, thickness 6 mm
    • Inventory:
      2686
    • Portable plate electrical machine (Inv. 2686)

Frictional electrical machine with a disk covered with black velvet. There is a Lane discharging electrometer. One of a set of four machines (inv. 2688 - inv. 2687 - inv. 2689) used to demonstrate the effects of different materials on the polarity of the generated charge, positive or negative. Provenance: Lorraine collections.