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File:Leibnitzrechenmaschine.jpg

Summary

Description
Deutsch: Nachbau einer Rechenmaschine von 1700 von de:Gottfried Wilhelm Leibniz
English: The Staffelwalze, or Stepped Reckoner, a digital calculating machine invented by Gottfried Wilhelm Leibniz around 1672 and built around 1700, on display in the Technische Sammlungen museum in Dresden, Germany. It was the first known calculator that could perform all four arithmetic operations; addition, subtraction, multiplication and division. 67 cm (26 inches) long. The cover plate of the rear section is off to show the wheels of the 16 digit accumulator. Only two machines were made. The single surviving prototype is in the National Library of Lower Saxony (Niedersächsische Landesbibliothek) in Hannover; this is a contemporary replica.
Date
Source recorded by me in de:Technische Sammlungen der Stadt Dresden (with photo permission)
Author User:Kolossos
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