Object Details
distributor
Adding Wonder Manufacturers
maker
Adding Wonder Manufacturers
Description
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.
Location
Currently not on view
Credit Line
Gift of Victor Comptometer Corporation
date made
ca 1925
ca 1919
ID Number
MA.323626
catalog number
323626
accession number
250163
Object Name
adder
Physical Description
paper (overall material)
wood (overall material)
Measurements
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
See more items in
Medicine and Science: Mathematics
Adder
Science & Mathematics
Data Source
National Museum of American History
Subject
Mathematics
Link to Original Record
Record ID
nmah_690247