[Collection of astronomical texts].

Collection of astronomical works by Naṣīr al-Dīn al-Ṭūsī, which include material on sunset and sunrise, the size of the earth, the moon, the distance to the moon, the distance between the sun and the planets, movement of the spheres, and eclipses. Some marginal notes in another hand, affected by trimming. 1 online resource (77 leaves) : paper