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Charles Whitwell, Emisfero nautico
Charles Whitwell, Nautical hemisphere

c. 1597
Brass; large disk diameter 28 cm, small disk diameter 20,5 cm
Florence, Istituto e Museo di Storia della Scienza, inv. 1099, 1122

This instrument, illustrated in Robert Dudley’s Arcano del Mare, is derived from a model by Michel Coignet (1549-1623) and served to compute tides. Provenance: Robert Dudley bequest.