A 17th century calculator. Each wooden rod shows a different times table. This object is one of two chosen by Joan for our Collections chat on 25 June 2020.
Set of Napier's Bones or reckoning tables, in oak case, British, c.1670
Set of Napier's Bones or reckoning tables, in oak case, British, c.1670
It was chosen again by Jila on Thursday 10 December 2020.
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Platt Hall Inbetween