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Mathematical Table, Pierson Machine For Calculating Interest
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
In the nineteenth century, several American inventors devised moving tables that allowed one to calculate interest. This is the U.S. Patent Office model for a device designed to calculate the amount of interest upon any amount less than one thousand dollars for any number of days less than eighty-five at two rates, six and seven percent. It was invented by Albert C. Pierson of Rahway, New Jersey.
National Museum of American History’s own descriptionCredit lineMathematical Table, Pierson Machine For Calculating Interest. 1867. Pierson, Albert C.. National Museum of American History. CC0.
