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Logarithmic Slide Rule
Photograph - Photograph
Logarithmic slide rule. This adjustable ruler contains the values for logs, which are used to aid multiplication and division. Logarithms are mathematical functions relating numbers to the powers of a set base number such as ten. Slide-rules have been superseded by the use of electronic calculators.
May 6th, 2013
Viewed 45 Times - Last Visitor from Beverly Hills, CA on 11/01/2014 at 10:06 AM
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