Jala' al-adhhan fi zij al-Battani

"Jala' al-adhhan fi zij al-Battani" ("The Polishing of Minds on al-Battani's Zij") is a book by Abu al-Rayhan al-Biruni on al-Battani's Zij. ¹ Nallino reports that al-Biruni, who praised al-Battani in his writings, himself testifies that he wrote a book under this title. ¹

Nallino mentions it while tracing the attention later scholars of the fifth Islamic century gave the Zij: Ali ibn Ahmad al-Nasawi judged it the most perfect observational zij; an anonymous pupil of Ahmad al-Sijzi cited it in his book on making the astrolabe; and al-Biruni wrote this book. ¹ Nallino says nothing of its survival or manuscripts. ¹