La versión simple del instrumento al-sarrāŷiyya: comentarios textuales y técnicos

There are two versions of the sarrājiyya instrument (fourteenth-century). This paper studies the simple version, editing and translating the manuscript Cairo, Dār al-kutub, mīqāt, 291, and analyzes how and when its use is recommended as well as its relationship with the shakkāziyya plate of the Andalusian astronomer al-Zarqālī (Azarquiel) (eleventh-century).