If you hang two pendulum clocks side-by-side and start their pendulums swinging, after about 30 minutes the pendulums will be swinging in perfect time with each other but in opposite directions.

Object Details ID Number ME.309240 catalog number 309240 Object Name Clock Pendulum, Part of Physical Description metal, "brass" (?? material) metal, steel (?? material) See more items in Work and ...

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New season CLOCKS AND COLOURS Arete Sterling-Silver And Quartz Ring More information $173.00 *Taxes and duties calculated in the shopping bag ...