The Astronomical Observatories of Jai Singh c5.81

c5.81

⁷ The instruments used by Flamsteed (1646-1719) were an iron sextant of 6 feet radius; a three-foot quadrant; a mural arc of 140 degrees and radius 7 feet, 'divided with hitherto unapproached accuracy,' and with which all his most valuable work was executed; two clocks and two telescopes. For further particulars of European instruments, see p. 83.