[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [The Astronomical Observatories of Jai Singh](https://indike.org/pramana/ins.science.kaye-1918) › c5.52 # The Astronomical Observatories of Jai Singh c5.52 The Astronomical Observatories of Jai Singh c5.52 - **Language:** English ### [c5.52](https://indike.org/pramana/ins.science.kaye-1918.c5.52) ¹⁰ An astrolabe with two rings or parts. It is the triquetrum or regulae parallacticae. Al-Battāni calls it the 'long alhidade' (Nallino i. 321). In Leiden is a MS. De ratione qua ope instrumenti Zat al-Sho'batain, etc., by the celebrated al-Kindi. Muḥammad bin Isḥāq b. Abi 'Abbād, Abu'l Ḥasan also wrote on the same instrument (Suter, pp. 25 and 48). - [Previous: c5.51](https://indike.org/pramana/ins.science.kaye-1918.c5.51) - [Next: c5.53](https://indike.org/pramana/ins.science.kaye-1918.c5.53) - [Up: c5](https://indike.org/pramana/ins.science.kaye-1918.c5) --- Source: [https://indike.org/pramana/ins.science.kaye-1918.c5.52](https://indike.org/pramana/ins.science.kaye-1918.c5.52) · Pramāṇa