Museo Galileo
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Virtual Museum
Graphometer
    • Setting:
      Room VI
    • Inventor:
      Philippe Danfrie
    • Maker:
      unknown
    • Date:
      17th cent.
    • Materials:
      brass
    • Dimensions:
      diameter 167 mm, height 125 mm
    • Inventory:
      151
    • Graphometer (Inv. 151)

Graphometer consisting of a horizontal semi-circle with a degree scale fitted on a rod with sights and mounted on a vertical support. At the center is the compass, around which a diopter rotates. This type of instrument was developed by the Frenchman Philippe Danfrie, who, in 1597, published a treatise illustrating the use of the graphometer. Provenance: Medici collections.