Promotion of Learning in India during Muhammadan Rule (by Muhammadans) c19.s2.12

c19.s2.12

the observations made in this observatory, the celebrated Astronomical Tables, known by the name of Muḥammad Shāhī, were drawn up by Mīrzā Khair-ullāh and Shaikh Muḥammad Muḥaddiṣ, under the supervision of Jai Singh, and the accuracy of the Tables was proved by the conjunction of two planets in 1154 A.H. (1741 A.D.) as recorded therein.¹ In the observatory at Delhi there is a big equatorial dial which for its accuracy and magnitude was called Samrāṭ Jantra by Jai Singh himself. The gnomons and the periphery of the circle are marked with degrees for determining altitudes and azimuths of the heavenly bodies. Besides this, there are two circular buildings open at the top and a small altitude-meter.²