Calculating Machine Components

Description
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.
Location
Currently not on view
Physical Description
metal (overall material)
plastic (overall material)
Measurements
overall: .6 cm x 2.3 cm x 2.3 cm; 1/4 in x 29/32 in x 29/32 in
ID Number
1983.3003.030
nonaccession number
1983.3003
catalog number
1983.3003.030
Credit Line
Gift of L. Leland Locke
subject
Mathematics
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Calculating Machines
Data Source
National Museum of American History