The Evolution of Timekeeping: From Obelisks to Hourglass Clocks
- The obelisks from Egypt, such as Cleopatra's Needles, are examples of shadow clocks that are almost 3,500 years old.
- Sundials, which divide the day into twelve parts, were created around the same time as obelisks.
- Around the year 1250, the first mechanical clock was invented, followed by the hourglass clock in 1400.
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和訳をお願いします An example of shadow clocks are the obelisks from Egypt. They are tell,thin buildings that come to apoint at the top. Cleopatra's Needles are the two most famous obelisks in the world. They are almost 3,500 years old. About the same time,people began to make sundials. Sundials have a round part to divide the day into twelve parts. Around the year 1250,someone made the first mechanical clock. It was a mechanical clock because it was a machine that ran by itself. It did not need the help of anything in nature. People began to use the hourglass clock around the year 1400. They made in from glass. It was wide at the top and bottom but narrow in the middle. They put some sand in one part. The sand ran from the top part to the bottom part of the glass in one hour. At the end of every hour people turned the glass over and began again.
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日時計（shadow clock）の例はエジプトのオベリスクである。それらは、その先頭が（時間を）指し示す、高く細い建物である。クレオパトラの針は世界でもっとも有名な二つのオベリスクである。それらは3500年前に作られた 同じ頃、日時計(sundial）が作られた、日時計(sundial）は半円を一日が12時間になるよう分割している 1250年頃、作者は不明だが最初の機械式時計を作った。それは自走する機械であるがゆえに機械式時計であった 1400年頃には人々は砂時計を作り始めた。それらはガラスから作られ、上部と下部が広いが、真ん中が狭い形をしている。幾ばくかの砂を一方に入れて、一時間で上部から下部へ砂が流れ落ちるようにした。一時間毎にひっくり返し、また計り始めていた
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