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Title: Adding Machine [Go to resource]
Description: Roth's calculating machine, invented and patented by D.J. Wertheimber in 1843, English currency version, License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: adding machines Temporal: 1843 Source: Science Museum Creator: Didier Roth Identifier: http://collectionsonline.nmsi.ac.uk/grab... Go to resource More Like this...-
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