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Matteo Botti e Giovanni Battista Botti, Bussola topografica
Matteo Botti e Giovanni Battista Botti, Surveying compass

17th cent.
Brass; diameter 18 cm
Florence, Istituto e Museo di Storia della Scienza, inv. 2506

This compass could be used to made architectural surveys by measuring the wall declination of a building.