At the Same Moment, Around the World by Clotilde Perrin

Author:Clotilde Perrin
Language: eng
Format: epub
Publisher: Chronicle Books LLC
Published: 2014-08-28T04:00:00+00:00

For this reason people developed other tools for telling time. They developed water clocks, which poured water at a certain rate, or used the length of time it took a candle or oil lamp to burn to track how much time had passed. The pendulum clock was invented in the 17th century, and soon other mechanical clocks were developed as well.

The Invention of Time Zones

Because the sun rises and sets at different times in different places due to the rotation of the Earth, clocks set by the sun aren’t accurate between regions. For example, when using solar time, the time in New York and Boston differs by about eight minutes. But imagine if you were traveling farther! The differences would be greater, making solar time even more inaccurate. Once communication by telegraph and travel by train became more common, the small differences in solar time between regions became problematic. Can you imagine not knowing when a train would arrive or depart?

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