Object Details maker Hartung, Maurice L. Description Maurice Hartung of the University of Chicago wrote this sixteen-page booklet to explain the use of natural log and logarithmic scales placed on ...

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Slide rules work using the idea that adding up logarithms is the same as multiplying. For example, for a base 10 logarithm, log (10)=1, log (100)=2, and log (1000)=3.