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Slide rule mentioned in Pepys' diary entry of May 5 1663
- ahazred8ta 10y agoNote that Oughtred developed the first slide rules circa 1622, based on earlier work by Gunter and Napier. Pepys mentioned seeing a very small one. https://en.wikipedia.org/wiki/William_Oughtred https://en.wikipedia.org/wiki/William_Oughtred