A collection of six treatises.
4to (150 x 206 mm). Arabic manuscript on paper. 102 (but: 99) numbered pages (pp. 75-77 skipped). Black and red ink, 15 lines, per extensum, with a few ink diagrams in the margins. Half leather over papered boards.
A collection of six treatises on sections, chronology, and astronomy, indexed on a cover label and, in pencil, on the inside front cover. Text in black ink with extensive commentary in red throughout the margins.
Binding loosened, gutters reinforced. Paper browned and brittle, but on the whole well-preserved with only very minor edge chipping.