My quest for the state of the clock of Prague has given a result.
The clock would have to indicate the local solar time as before.
To please the tourists who assemble there, the clock indicates Central European
Time.
It was originally set to mean solar time and from time tot time it was manually
adjusted to correct the Equation of Time.
The watch maker of the clock on this moment, Petr Skala, describes its history
as follows:
In 1912, it was set to indicate Central European Time (C.E.T.)
In 1957, the indication of the Bohemian time is adjusted accordingly.
The hour lines of unequal hours are fixed and can not be adjusted. That
indication is actually wrong.
Because Prague (14 ° 25 'E) is near the 15-degree meridian line, the reference
for Central European Time, the difference between C.E.T. and the local solar
time is about two minutes. plus a correction equal to the Equation of Time.
In February and early November, the total difference is on its maximum: about a
quarter of an hour.
Then the clock, respectively, gains about a quarter of an hour and is about a
quarter of an hour slow with regard to local solar time.
See more on my website: http://www.wijzerweb.be/prague.html
Willy Leenders
Hasselt in Flanders (Belgium)
Visit my website about the sundials in the province of Limburg (Flanders) with
a section 'worth knowing about sundials' (mostly in Dutch):
http://www.wijzerweb.be
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