In this penultimate presentation of this video series built around The Geek Atlas, the author John Graham-Cumming discusses The Arago Medallions, which mark the meridian that runs through Paris:
Previous presentations:
Horn Antenna, Holmdel, NJ, USA
Down House, Downes, Kent, UK
Royal Institution of Great Britain, London, UK
Experimental Breeder Reactor No1, Idaho, USA
Check out: The Geek Atlas website.
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