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[Phys-l] Boyancy. Was: Re: [clocksgroup] Grasshopper questions



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.