Equation clock

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a timepiece made to exhibit the differences between mean solar and apparent solar time.

See also: Equation

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Check out the Giant Ps arty BBQ, the bespoke BBQ Branding Tool (make sure there's a steak with your name on it) and the mind-bending Equation Clock, below, that will bend your mind before a few beers let alone afterwards.
Although he enthusiastically encouraged the present, the King also had a healthy respect for the achievements of the past: it is intriguing that he chose Thomas Tompion's longcase equation clock, made in about 1703 for Prince George of Denmark, for his own use at Buckingham House.
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