Ghati Yantra

To understand Ghati Yantra , we go observe the following Shloka

The meaning of the above shloka is that a Ghatika or (bowl) is a hemispherical vessel made of copper with a small aperature at the bottom so that it sinks into the water 60 times in a day and night. The Ghati Yantra looked like this:

The clepsydra (Ghatī -yantra) was used in India for astronomical purposes until recent times. The above Shloka is of Bharamagupta. Brahmagupta of Bhilamala in Rajasthan, who was born in 598, wrote his masterpiece, Brahmasphuta Siddhanta, in 628. His school, which was a rival to that of Aryabhata, has been very infuential in western and northern India. Brahmagupta’s work was translated into Arabic in 771 or 773 at Baghdad and it became famous in the Arabic world as Sindhind. One of Brahmagupta’s chief contributions is the solution of a certain second order indeterminate equation which is of great significance in number theory. Another of his books, the Khandakhadyaka, remained a popular handbook for astronomical computations for centuries.

The gahtiyantra theory interprets that the vessel sinks in 24 Minutes.