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Sector
Signed by Robert Beckit
Dated 1597; London
Brass with iron points; 329 mm in radius

One of the oldest English sectors to survive, this instrument is dated before the publication of Thomas Hood's 1598 account of the instrument.

Although lacking the sights which would equip it for surveying and other observational work, the instrument is evidently closely related to the first published pattern for the English sector. It would have been used chiefly with a pair of dividers as a geometrical device for proportions and graphical calculation.

Museum of the History of Science, Oxford
Inventory number 38251

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