Arithmeum
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      • 45) The Pope's Arithmomètre by Thomas de Colmar
      • 44) The square root unit of the Friden SRW automatic square root mechanism
      • 43) The concept for Maurel's calculating machine from 1842
      • 42) The Piano Arithmomètre from the 1855 World Exhibition
      • 41) The adding machine of Thomas de Colmar
      • 40) The Walther DMKZ
      • 39) The Curta
      • 38) The carry of tens by Gottfried Wilhelm Leibniz 1677
      • 37) Insight into the restoration work at the Arithmeum
      • 36) The Atanasoff Berry Computer by John Atanasoff and Clifford Berry
      • 35) Cylindrical four-species adapting segment machine from Anton Braun
      • 34) Johann Jakob Sauter's adding machine from the late 18th century
      • 33) Calculator from the 17th century - Burattini or Morland?
      • 32) The adding machine by Charles Xavier Thomas from 1849
      • 31) The “Grasshopper” by George B. Grant from 1871
      • 30) The Centennial four-species calculating machine by George B. Grant
      • 29) Didier Roth's coplanar toothed disk adding machine from 1842
      • 28) Joseph Edmondson's circular stepped drum machine for all four basic arithmetic operations
      • 27) Coplanar toothed disk adding machine by Charles Stanhope from 1780
      • 26) “Matador” keyboard adding machine with crank 1906
      • 25) The single column key adding machine by Ferdinand Hebentanz from the year 1873
      • 24) Column adding machine by Moses and William Pullen from the year 1874
      • 23) „The Improved Adding Machine“ by Caroline Winter from 1859
      • 22) The arithmetic manipulator by Niccola Guinigi from 1858
      • 21) Tito Gonnella’s coplanar adding machine with tooth lock washers from the year 1859
      • 20) The automatically multiplying calculating machine by François Timoléon Maurel and Jean Jayet from the year 1846
      • 19) The “Z25” transistor computer by Konrad Zuse
      • 18) Arthur Burkhardt’s Arithmometer – the start of calculating machine production in Germany at the end of the 19th century
      • 17) Didier Roth’s circular calculating machine for automatic multiplication from 1841
      • 16) The mechanical calculator for all four arithmetical operations by Anton Braun (1727)
      • 15) “The Millionaire” – Calculating machine for direct multiplication by Otto Steiger
      • 14) The four-species calculating machine with a switching latch by Heyde and Büttner from the year 1883
      • 13) Four-species calculating machine with a switching latch mechanism by Friedrich Weiss from the year 1893
      • 12) Prototype of the four-species calculating machine with a switching latch mechanism by Curt Dietzschold from the year 1876
      • 11) Christel Hamann’s “Gauss-Mercedes” calculating machine with the unique stepped disc from the year 1909
      • 10) Jacob Auch's adding machine
      • 09) The "Hamann Manus" calculating machine
      • 08) Adding machine by Philipp Matthäus Hahn
      • 07) The patent model of Thomas de Colmar’s Arithmomètre from the year 1820
      • 06) Multiplication Instrument by Samuel Morland
      • 05) Johann Christoph Schuster's calculating machine
      • 04) Blaise Pascal's calculating machine
      • 03) The mechanical calculator for all four arithmetic operations by Axel Jacob Petersson
      • 02) The mechanical calculator for all four arithmetic operations by Johann Jakob Sauter
      • 01) The first mechanical calculator for all four arithmetic operations by Gottfried Wilhelm Leibniz
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Opening of the Arithmeum

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Eröffnung des Arithmeums 08.09. 1999   02:00

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ARITHMEUM

Lennéstr. 2, 53113 Bonn

Phone: +49 (0)228 73 87 90

Opening hours: Tuesday - Sunday 11:00 am - 06:00 pm

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