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Calculating Machine Components

Calculating Machine Components

Usage conditions apply
These objects were collected by Brooklyn high school teacher and historian of mathematics L. Leland Locke. Each of the seven white plastic number wheels has the digits from 0 to 9 marked on the rim in red. A steel gear is attached to one side and a round steel piece with a pointer to the other. The dimensions given are those of each wheel.
Currently not on view
Object Name
calculating machine components
Physical Description
metal (overall material)
plastic (overall material)
overall:.6 cm x 2.3 cm x 2.3 cm; 1/4 in x 29/32 in x 29/32 in
ID Number
nonaccession number
catalog number
Credit Line
Gift of L. Leland Locke
See more items in
Medicine and Science: Mathematics
Calculating Machines
Science & Mathematics
Data Source
National Museum of American History
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