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June 5, 2014

Just Found: the Oldest Solar Device in the World

Just Found! The Oldest Solar Device in the World (via Green Building Elements)

Special thanks to author John Perlin for this contribution about what is believed to be the world’s oldest solar device – a solar ignitor, or yang-sui . The material comes from Perlin’s recently published book, Let It Shine: The 6000-Year Story…

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