Burroughs Model 9 Adding Machine

This full-keyboard manually operated printing adding machine has a metal frame painted black, a metal mechanism and handle, a green felt keyboard, and a glass front. There are six columns of number keys, with nine keys in each column. Some plastic key covers are missing. There are non-add, subtotal, and total keys. The sum appears on number wheels visible through the glass front of the machine and prints on a 2-1/2 inch paper tape at the back which is not visible. The machine is marked on the front: BURROUGHS (/) DETROIT, MICHIGAN. It is also marked there: No.6-157907.
Alfred Harrell, the donor of the machine, was a Smithsonian photographer.
Currently not on view
Object Name
adding machine
date made
Burroughs Adding Machine Company
Physical Description
plastic (overall material)
metal (overall material)
wood (overall material)
glass (overall material)
overall: 31.5 cm x 23.5 cm x 39 cm; 12 13/32 in x 9 1/4 in x 15 11/32 in
place made
United States: Michigan, Detroit
ID Number
accession number
catalog number
Science & Mathematics
Adding Machines
See more items in
Medicine and Science: Mathematics
Adding Machines
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Al Harrell
Additional Media

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