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II.4 Trigonometric quadrants
Maker:Christoph Schissler [attr.]
Place:German
Date:late 16th cent.
Materials:gilt brass
Dimensions:radius 120 mm
Current inventory:2529, 2637
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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.

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