Museo Galileo
italiano
previous
Virtual Museum
Graphometer
    • Setting:
      Room VI
    • Maker:
      "Ring"
    • Place:
      Berlin
    • Date:
      18th cent.
    • Materials:
      brass
    • Dimensions:
      length 290 mm
    • Inventory:
      3630
    • Graphometer (Inv. 3630)

Graphometer signed by Ring, a maker about whom we have no information. The base, which rests on an articulated foot, consists of a bar with viewers. The degree scale is fixed to both ends of the bar. A rotating diopter with a magnetic compass and level pivots at the center of the semicircle. The instrument, introduced by Philippe Danfrie in the late sixteenth century, was used to measure position angles in surveying.