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Inventory no. 26702 - Former Display Label

English CIRCULAR PROTRACTOR
c.1730

Brass. Signed, "J. Sisson LONDON."; undated.

This instrument is divided to half-degrees. Jonathan Sisson (? 1694-1749), a maker of optical and mathematical instruments "was considered specially adept at the precise divisions of scales". (Taylor, Math. Pract., 306)

Lent by Christ Church.

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