The Astronomical Observatories of Jai Singh c10.73

c10.73

In 1799 W. Hunter published³ a fairly complete account of the Delhi observatory. The list of buildings and the descriptions he gives show that, to the west of the Miśra Yantra and close to it was a wall in the plane of the meridian, on which was described “a double quadrant having for centres the two upper corners of the walls . . . . One degree on these quadrants measured 2·833-inches.”⁴ Also, in describing the Miśra Yantra, he makes no mention of the third quadrant (Agra Yantra) on the west side. Referring to the Samrāṭ Yantra he states “It is built of stone, but the edges of the gnomon and arches, where the graduation was, were of white marble, a few small portions of which only remain.”