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Title: Thomas De Colmar's Arithmometer, c 1870. [Go to resource]
Description: Arithmometer calculating machine with detachable lid by Thomas de Colmar, no.2034 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: calculating machine (stepped drum) Temporal: 1880-1900 Source: Science Museum Identifier: http://collectionsonline.nmsi.ac.uk/grab... Go to resource More Like this...
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