The Astronomical Observatories of Jai Singh c10.49

c10.49

On either side of the Niyat Yantra, and joined to it, is half of an equinoctial dial, constructed on the same principle as the large Samrāṭ Yantra. On the west side of the building is a second quadrant, the face of which is horizontal instead of being parallel to the axis. It is called the Agrā Yantra or ‘amplitude instrument,’ and its use does not seem to have been understood by the restorers. Hunter makes no mention of this.