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Barbour Calculating Machine Model
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
In the late 19th century, several inventors turned their attention to designing better machines for doing arithmetic. This model calculating machine, patented by Edmund D. Barbour of Boston, was intended to multiply a number by a digit directly, rather than requiring repeated addition. Barbour submitted the model to the U.S. Patent Office, and received a patent for the invention on August 13, 1872.
National Museum of American History’s own descriptionCredit lineBarbour Calculating Machine Model. 1872. Barbour, Edmund D.. National Museum of American History. CC0.
