Harvard Project Physics Circular Slide Rule

Description
The slide rule is a device to assist in multiplication, division and other mathematical operations. Invented in the 1600s, it became popular in American science and engineering in the 1890s. By the 1930s, slide rule use was taught in high schools.
From 1962 until 1972, Harvard University faculty cooperated with others in developing a humanistically oriented high school physics course that might attract more students to the subject. Staff developed not only textbooks, handbooks, transparencies and film loops but this extremely simple and inexpensive plastic slide rule.
The instrument has two circular logarithmic scales for multiplication and division (most elementary slide rules also had scales for taking squares and square roots). There also are linear scales of inches and centimeters.
A stylized bubble chamber image, the logo of Project Physics, appears over the rule. The slide rule was designed so that "Harvard Project Physics" showed just over the shirt pocket of a boy carrying it. This design may reflect the fact that there were no female undergraduates at Harvard College at the time. Not long after this slide rule was made, inexpensive pocket calculators displaced the slide rule.
Location
Currently not on view
Object Name
slide rule
Physical Description
plastic (overall material)
metal (part material)
Measurements
overall: .3 cm x 7.7 cm x 12.7 cm; 1/8 in x 3 1/16 in x 5 in
ID Number
1988.0539.01
accession number
1988.0539
catalog number
1988.0539.01
subject
Science & Mathematics
School
Education
Sputnik
Slide Rules
Mathematics
See more items in
Medicine and Science: Mathematics
Sputnik
Slide Rules
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Gerald Holton

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