Harrison describes his clock to George Graham, and the accuracy astounds him. In reality, Harrison invented the "gridiron pendulum" (which made such accuracy possible) in 1726. However, Graham had invented the even more accurate "mercury pendulum" in 1721, so he would not have stated such accuracy "can't be done", when first meeting Harrison in 1730.
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05/03/2025 alle ore 08:01
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