Museo Galileo
Virtual Museum
Trigonometric quadrants
    • Setting:
      Room II
    • Maker:
      Christoph Schissler [attr.]
    • Place:
    • Date:
      late 16th cent.
    • Materials:
      gilt brass
    • Dimensions:
      radius 120 mm
    • Inventory:
      2529, 2637
    • Trigonometric quadrants (Inv. 2529, 2637)

Two identical German-made quadrants, possibly the work of Christoph Schissler. Both carry the sine grid, known as the reduction quadrant. Served to compute sines and cosines. Brought to Florence from Germany by Prince Mattias de' Medici in the first half of the seventeenth century.