The Astronomical Observatories of Jai Singh c7.1

c7.1

16. The instrument shown in figures 19 and 20 is dated the 23rd year of the reign of Aurangzeb and A. H. 1091 (A.D. 1680), and was made at Delhi for Nawab Iftikhār Khān of Jaunpur¹ by a certain Ziā al-Dīn b. Mullā Qāsim Muḥammad b. Ḥāfiz Īsā b. Allah Dād, Humāyūnī, aṣṭurlāb maker of Lahore.² The instrument is now at Jaipur. It is labelled ‘Yantra Jara Kālī sarva deśī.’ It is two feet in diameter and is made of brass and consists of one disc only engraved on both sides and is described in the inscription as a ‘Zarqālī astrolabe’³ and as a ‘single leaf’ instrument.