The Astronomical Observatories of Jai Singh c9.7
The Astronomical Observatories of Jai Singh c9.7
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c9.7
28. The Samrāṭ Yantra or ‘Supreme instrument’¹ is, as its name implies, the most important. It is an equinoctial dial, consisting of a triangular gnomon with the hypotenuse parallel to the earth’s axis, and on either side of the gnomon is a quadrant of a circle parallel to the plane of the equator. It is, in principle, one of the simplest ‘equal hour’ sundials.