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LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
License this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
License this image for commercial use at Science and Society Picture Library
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Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum, London|UCL
Arithmometer calculating machine with detachable lid by Thomas de Colmar, no.2034
Thomas De Colmar arithmoneter with detachable lid, no. 2034, 1880-1900. Charles X Thomas de Colmar invented his 'arithmometer' in 1820, which became the first commercially successful calculating machine in the 1860s. It could be used for addition, subtraction, division and mulitiplication. The mechanism was based on the stepped reckoner invented by Liebniz (1646-1716). Machines of this type were made well into the 20th century.