Risalat al-Mizzi fi al-asturlab (al-Mizzi's treatise on the astrolabe)

Risalat al-Mizzi fi al-asturlab (al-Azhar Library no. 476/65513) is one of the manuscripts on observational instruments, the field in which its author excelled. ¹

The Bibliotheca Alexandrina book says the treatise explains the names of the markings on the astrolabe, how to take altitudes, the two shadows, declination, distance and the latitudes of towns, the arcs of night and day, the hour-angle by night and day, maximum altitude, prayer times, the risings of the zodiacal signs, the azimuth for each altitude, the qibla azimuth and its deviation, the times of rising and setting of stars, and some surveying, such as finding the height of columns and mountains and the depth of wells. ¹