Contemporary full brown sheep binding. Decorated spine with raised bands. Brown sheep title label. Upper joint narrowly cracked for most of its length. Lower joint split at head and tail. Boards rubbed and scuffed, with some lacks. Corners very bumped and trimmed, worn. Scattered worming.
The treatise is preceded by a dissertation on recent progress in astronomy. The work is a scientific presentation of the great astronomical laws (movement, time, eclipses...) and the solar system, with different calculation methods. It also relates all the great astronomical observations.