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I've thought about this a bit and don't understand how a large arc
mitigates atmospheric buoyancy effect on the pendulum's period.
bc maybe's had it
On 2008, Apr 09, , at 13:54, Peter Jordan wrote:
> John Harrison used a grasshopper with a large pendulum arc in his
> wooden regulator clocks as a means of minimising the effects of
> changes in air density on the pendulum.