MORIN Jean-Baptiste (1583-1656). Astrologia gallica principiis & rationibus propriis stabilita (The Hague, Adrian Vlacq, 1661). In-folio (34,9 x 22,3 cm), brown calf, spine with ornate nerves (period binding). Posthumous first edition of Morin's main treatise, illustrated with some figures in the text and his etched portrait. In this work he reaffirms the status of astrology as an exact science, against the current of his time which tends to move away from it. Wetness, stains and foxing on the first and last leaves, 2 small holes in the title, binding rubbed and stained, with some restorations.