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  Pacific Science Center - toilet demonstration - YouTube

  https://www.youtube.com/watch?v=k2JkargRs00

  This is a bisected toilet demonstration at the Pacific Science Center in Seattle, WA.

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  Speeding Speech - (1950s) - YouTube

  https://www.youtube.com/watch?v=oPM_j7p7YnQ

  THIS FILM IS PUBLIC DOMAIN Automation in the telephone industry dispenses with operator long distance dialing to complete calls faster. This film explains ho...

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