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To: Bobbyvotes; week 71

Ancient Chinese Earthquake Detector.

Could tell the Chinese from which direction the earthquake occurred.

https://www.engadget.com/2018-09-28-backlog-zhang-heng-seismoscope.html

52 posted on 07/16/2026 2:01:55 PM PDT by Pontiac (The welfare state must fail because it is contrary to human nature and diminisheRs the human spirit.)

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To: Pontiac

Very clever gadget :)

55 posted on 07/16/2026 7:07:51 PM PDT by Bobbyvotes (Work is best form of worship to Gods.. per Bhagavad at ratio Geeta, the Hindu sacred book. )

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