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Leibniz calculator 1673; addition, subtraction, multiplication and division | Mechanical calculator, Calculator, Mechanical computer
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Leibniz Calculating Machine. Replica by Robert Guatelli · Traub-McCorduck Collection · CMU Libraries
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Deutsches Museum on X: "Calculator of Gottfried Wilhelm #leibniz @DeutschesMuseum : The famous #polymath was born in Leipzig 370 years ago. https://t.co/mDa4vZ6VNQ" / X
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