The Ancient Indian Water Clock – Ghatika Yantra
In Ancient India religious practices and beliefs often lead to particular discoveries or inventions. In all the religions that took their birth in India , use to follow some particular times of the day to perform their religious rituals at particular times of the day. But they had no reliable way of telling the time.
How do u tell the time , we can have stick in the ground and look a the ground other wise we can have a sun dial .
But the point is the sunlight is on a sunny day , but completely use less on a cloudy day. What Indians decided to do is to try and make a different source of clock , that is a Water clock called as Ghatika Yantra.
How It Looks And How It works ?
It works on very simple mechanism it consists of a copper cup with a small hole at its bottom in large water bowl/tank, and every time the cup sank a gong was sounded. When it sinks in and touches the bottom , that’s fixed time probably around 30 minutes( depends on the materials made and their sizes).
And there is a sad story about this in India during 12th century. There was a princess, the astrologers said that she would bevel marry, but her father worked out and found that there is one propitious moment when she could marry and he built a special Ghatika Yantra so that the moment it touches the tank she could get married . Princess was a bit nervous about it , she went and peered into the tank and a pearl from her dress dropped into the coper bowl, therefore blocking the water to enter into the copper cup never bringing it to the bottom and she was never able to marry.
The description of a water clock in astrologer Varahimira’s Pancasiddhantika (505) adds further detail to the account given in the Suryasiddhanta. The description given by mathematician Brahmaguptha in his work Brahmasphutasiddhanta matches with that given in the Suryasiddhanta. Astronomer Lallacharya describes this instrument in detail. In practice, the dimensions were determined by experiment.
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