The Little Adding Wonder

This notched band adder has a wooden framework. Six paper bands move in six columns, showing the result in six windows. A paper sheet glued to the front has numerals and the name of the device, as well as cutouts to create the columns. A sheet glued to the back gives instructions. The columns widen at the top for carrying in addition and at the bottom for borrowing in subtraction. The object came to the Smithsonian from the collection of Felt and Tarrant Manufacturing Company. The date assigned is quite arbitrary.
Reference: P. Kidwell, “Adders Made and Used in the United States,” Rittenhouse, 1994, 8:78-96.
Currently not on view
Object Name
date made
ca 1925
Adding Wonder Manufacturers
Adding Wonder Manufacturers
Physical Description
paper (overall material)
wood (overall material)
overall: .6 cm x 8.6 cm x 20 cm; 1/4 in x 3 3/8 in x 7 7/8 in
place made
United States: Washington, Spokane
place distributed
United States: Washington, Spokane
ID Number
catalog number
accession number
Science & Mathematics
See more items in
Medicine and Science: Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Victor Comptometer Corporation
Additional Media

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