Epact Scientific Instruments of Medieval and Renaissance Europe

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Protractor
Signed by David Usslaub
Dated 1599; German
Gilt brass; 90 mm in diameter

This small, gilded brass instrument is made up of a thin, graduated circular plate with an internal semicircle removed to create a straightedge on a diameter. The engravings are very accurate. The instrument is signed by David Usslaub, about whom nothing is known.

The protractor is associated with the group of mining instruments brought from Germany by Prince Mattias de' Medici in 1635.

Istituto e Museo di Storia della Scienza, Firenze
Inventory no. 3182

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