William Powell's Slide Rule

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William Powell's Slide Rule

William Powell used this slide rule while teaching courses on aeronautics at the Bessie Coleman Flying Club.

Photographer:

Eric Long

ID#:

2011-00609

Source:

National Air and Space Museum Archives, Smithsonian Institution

Copyright:

Smithsonian Institution

Rights Usage:

Contact Smithsonian Institution

Terms of Use:

Smithsonian Terms of Use

For print or commercial use please see permissions information.

Photographer:

ID#:

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