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  • 21 Aug, 2019

  • By, Wikipedia

File:Leibniz Stepped Reckoner.png

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current12:48, 16 January 2008Thumbnail for version as of 12:48, 16 January 20081,235 × 803 (213 KB)Chetvorno{{Information |Description=Photo of the ''Staffelwalze'' (English: 'Stepped Reckoner') a prototype mechanical calculator invented by German mathematician Gottfried von Leibniz in 1674. Thi
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