The Astronomical Observatories of Jai Singh c12.12

c12.12

The Nari Valaya or 'Circular dial' is constructed on the same principle as those at Benares and Jaipur. It is situated a few feet to the south of the Samrāṭ Yantra, and consists of a cylinder 7½ feet long 3 feet 7½ inches in diameter, whose axis is fixed horizontally in the plane of the meridian, the faces of the cylinder being cut parallel to the plane of the equator. In the centre of each face, and at right angles to it, was an iron style, round which was a circle graduated into ghaṭis and subdivisions. The styles and graduations have disappeared.