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Baldassarre Lanci [attr.], Strumento per triangolazioni
Baldassarre Lanci [attr.], Triangulation instrument

c. 1560
Gilt brass; length 53 cm
Florence, Istituto e Museo di Storia della Scienza, inv. 3164

This instrument was used for measuring the distance of inaccessible locations, presumably from two surveying stations whose distance was proportional to the length of the mobile arm.