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before clocks were commonplace observatorys like this one had the duty of keeping a measure of the time, the yellow ball on this observartory drops at 1pm each day, observors from long distances away can tell the time acurately, why would a sound like cannon firing not be so acurate to transmit the time over a long distance?
- architecture travel direction arrow vane weather wind roof architectural ornament decorative sky building bricks observatory time ball
- 3500 x 2343
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- 1409 kB