The Astronomical Observatories of Jai Singh c13.11

c13.11

The other Dakṣiṇovṛitti Yantra is a self-contained instrument, consisting of a wall lying in the meridian, on the east face of which are two quadrants, each of 7 feet 9½ inches radius. Sir Robert Barker in 1777 stated that the quadrants were of different radii, the larger of which he judged to be 20 feet. If his description be correct, the instrument must have been entirely rebuilt later on, possibly when the Mānmandira was added to. In 1865, to the east of this instrument were three circles of 10 feet 3 inches, 2 feet 4 inches, and 3 feet 5 inches, respectively, in diameter; and also a stone square with sides 2 feet 2 inches. The circles were possibly used for construction purposes.