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September 15, 2022 01:09 pm GMT
Original Link: https://boingboing.net/2022/09/15/the-ancient-art-of-telling-time-with-fire-and-smoke.html
The ancient art of telling time with fire and smoke
In China, the use of incense smoke to tell time dates back to the 6th century CE. Incense would be lit at the bottom of a maze and burn its way through, with outlets to vent the smoke and indicate the time. — Read the rest
Original Link: https://boingboing.net/2022/09/15/the-ancient-art-of-telling-time-with-fire-and-smoke.html
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