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clgr:Charles_Xavier_Thomas
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clgr:Arithmometer
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clgr:Arithmometer
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owl:NamedIndividual clgo:French_invention_or_discovery clgo:Mechanical_calculator clgo:Computer-related_introduction_in_the_19th_century clgo:1820_introduction clgo:Invention_in_the_collection_of_the_Smithsonian_Institution
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Arithmometer
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Thomas calculating machine Thomas' Arithmometer arithmometer Thomas' arithmometer Arithmomètre