KABOOM at noon: The meridian cannon

Of course there were clocks, cannons and sundials in the 18th century. There also was an elaborate instrument that seems to be a mix of all of them: the meridian cannon – a sundial with a little cannon announcing 12 o’clock noon with a loud bang.
What looks like a pyrotechnic gadget to amuse your guests or annoy your neighbours is actually a scientific instrument to measure true solar time correctly in an age where many timepieces lost or gained 15 minutes a day.

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