How Eratosthenes Calculated the Earth's Circumference in Ancient Greece | Hacker News

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		How Eratosthenes Calculated the Earth's Circumference in Ancient Greece (greekreporter.com)
		3 points by elorant on July 30, 2022 \| hide \| past \| favorite \| 1 comment

jaclaz on July 30, 2022 [–]

AFAIK, there wasn't any stick in Syene, but rather a well.

And in Alexandria it was a column or an obelisk (and not a stick).

https://lidimatematici.files.wordpress.com/2010/11/eratosten...

It would make sense as the shadow of a stick would have been very short, and would have introduced a huge error when measuring it.

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