This work seems to be in Arabic but note that according to P. G. Schmidl, in 1416 Kāshī composed by order of Sultan Iskandar, possibly the Qarā‐Qoyunlu king, the Risāla dar sharḥ‐i ālāt‐i raṣd, a commentary on observational instruments, preserved in 2 Persian manuscripts in Leiden and Tehran. [see BEA]. 