File:Leibniz Stepped Reckoner.png
Summary
Photo of the Staffelwalze (English: '<a href="https://en.wikipedia.org/wiki/Stepped_Reckoner" class="extiw" title="wikipedia:Stepped Reckoner">Stepped Reckoner</a>'), a prototype mechanical calculator invented by German mathematician <a href="https://en.wikipedia.org/wiki/Gottfried_von_Leibniz" class="extiw" title="wikipedia:Gottfried von Leibniz">Gottfried Wilhelm Leibniz</a> in 1674 and completed in 1694. About 67 cm (26 in.) long. This was the first calculator able to do all four arithmetic operations: addition, subtraction, multiplication, and division. Only two Stepped Reckoners were built. This one was found by workmen in 1879 in the attic of a building at the University of Gottingen, and is now in the <a rel="nofollow" class="external text" href="http://www.nlb-hannover.de/">National Library of Lower Saxony</a> (Niedersächsische Landesbibliothek), Hannover, Germany. For more information see <a rel="nofollow" class="external text" href="http://www.xnumber.com/xnumber/">James Redin (2007) A Brief History of Calculators Part 1: The Age of the Polymaths</a>. Caption: "Leibnitz calculator, made in 1694. The first two-motion machine designed to compute multiplication by repeated addition". Alterations: cropped out frame and caption, increased brightness.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:34, 5 January 2017 | | 1,235 × 803 (213 KB) | 127.0.0.1 (talk) | <p>Photo of the <i>Staffelwalze</i> (English: '<a href="https://en.wikipedia.org/wiki/Stepped_Reckoner" class="extiw" title="wikipedia:Stepped Reckoner">Stepped Reckoner</a>'), a prototype mechanical calculator invented by German mathematician <a href="https://en.wikipedia.org/wiki/Gottfried_von_Leibniz" class="extiw" title="wikipedia:Gottfried von Leibniz">Gottfried Wilhelm Leibniz</a> in 1674 and completed in 1694. About 67 cm (26 in.) long. This was the first calculator able to do all four arithmetic operations: addition, subtraction, multiplication, and division. Only two Stepped Reckoners were built. This one was found by workmen in 1879 in the attic of a building at the University of Gottingen, and is now in the <a rel="nofollow" class="external text" href="http://www.nlb-hannover.de/">National Library of Lower Saxony</a> (Niedersächsische Landesbibliothek), Hannover, Germany. For more information see <a rel="nofollow" class="external text" href="http://www.xnumber.com/xnumber/">James Redin (2007) A Brief History of Calculators Part 1: The Age of the Polymaths</a>. Caption: "Leibnitz calculator, made in 1694. The first two-motion machine designed to compute multiplication by repeated addition". Alterations: cropped out frame and caption, increased brightness. </p> |
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