Watch Mr. Wizard—Why Ships Float

Before video tape came into wide use, television programs were recorded as “kinescopes”, filmed from a monitor playing the live program. This is episode 166 of the long-running program “Watch Mr Wizard” from 1961 with Don Herbert, explaining buoyancy and Archimedes’ principle. The vintage film has damaged sprocket holes that cause some break-ups in the middle of the program, but it’s still watchable.