Museo Galileo
Virtual Museum
Dip circle
    • Setting:
      Room XI
    • Maker:
    • Date:
      second half 18th cent.
    • Materials:
      ivory, brass, steel
    • Dimensions:
      total height 210 mm, max. diameter 240 mm
    • Inventory:
    • Dip circle (Inv. 1195)

Marble base set in mahogany with three leveling screws, ivory case with hinged front and back windows. The magnetic needle pivots on a horizontal axle resting on brass supports set into the ivory frame. The instrument measures the magnetic dip generated by the lines of force of the Earth's magnetic field; the angle of dip is 0° at the equator and 90° at the poles. Provenance: Lorraine collections.