Universal Book Ratings
The Equation of Time - AEquatio Dierum: A Journal, a Reference & a Picture Book
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£27.18£28.33 -
£10.58
£12.58 -
£16.71
£17.13
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During the Early Middle Ages, astronomers utilized this Equation to assist in lunar observations. Throughout the High & Late Middle Ages, sundials held prominence as the primary means of timekeeping, indicating Solar Time.
However, in the 17th century CE, the emergence of precise pendulum clocks and watches prompted a gradual shift towards the adoption of Mean Time over Solar Time. In particular, the use of Solar Time corrected by the Equation-of-Time to determine local mean time, was used in the determination of longitude at sea.
Prior to the availability of time signals, sundials - together with tables detailing the Equation - were used to set clocks. .
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£27.18
£28.33 -
£10.58
£12.58 -
£16.71
£17.13
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