Museo Galileo
Virtual Museum
Nobili's models of Ampère's theory of magnetism
    • Setting:
      Room XIII
    • Inventor:
      Leopoldo Nobili
    • Maker:
    • Date:
      ca. 1830
    • Materials:
      wood, paper
    • Dimensions:
      235x25x25 mm
    • Inventory:
    • Nobili's models of Ampère's theory of magnetism (Inv. 3759)

Models made by Leopoldo Nobili to illustrate André-Marie Ampère's theory of magnetism. They are composed of two square-section wooden rods, covered with paper, with arrows drawn at right angles to the length and labeled "N" and "S" in ink. According to Ampère, the arrows indicate the direction of the current when an iron or steel bar is magnetized. They represent the sum of the electromagnetic currents around the molecules composing the bar. Provenance: Lorraine collections.