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December 5, 2012

1860s adding machine

Filed under: Item of the Day — Lizzie Ehrenhalt @ 9:30 am

1860s adding machine

Adding machine of the type patented by George B. Fowler on July 14, 1863.  Users performed operations by moving a sliding bar with a pin or pen tip.

For details, view the adding machine in our online collections database.

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