American slide rule manufacturers sometimes hired university professors to prepare instruction manuals for their products. Maurice L. Hartung, a professor of education at the University of Chicago, prepared this one for Pickett, Inc. The ninety-five page paperbound volume describes a wide range of scales found on Pickett slide rules. It was copyrighted in 1953.
The instructions came to the Smithsonian with a Pickett Model N-500-ES slide rule from 1962 or later (see 1999.0096.01).
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