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Title: Mechanical counter, "Elm City Counter", patented 1891 and ma [Go to resource]
Description: Mechanical counter, "Elm City Counter", patented 1891 and made by The C.J. Root Co., Bristol, Connecticut, U.S.A. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: adding machine Temporal: 1891-1900 Source: Science Museum Creator: Root, C.J. Company Identifier: 1990-710 Go to resource More Like this...
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