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Surveying Instrument
Signed by Christoph Trechsler
Dated 1572; German
Gilt brass; 120 mm in length

These two small instruments are integrated with each other. The first is a heavy square, with a compass at its centre which has lost its needle. It is also provided with mobile pointers. Two graduated circles are engraved around the centre.

The second instrument is a triangle which bears on one face the monogram of its maker 'C.T.', i.e. Christoph Trechsler. One arc is engraved with descending graduations, corresponding to a linear scale.

Probably these both belonged to a single instrument brought from Germany by Prince Mattias de' Medici, of which only these two parts have survived.

Istituto e Museo di Storia della Scienza, Firenze
Inventory no. 643

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