3545510 Author\'s own annotated copy of \'Horologium oscillatorium sive de motu pendulorum ad horologia aptato demonstrationes geometricae\' by Christiaans Huygens (1629-95), Paris: F. Muguet, 1673 (printed type with marginalia in ink on paper, quarter morocco binding) by French School, (17th century); 35.1x23.8 cm; Private Collection; (add.info.: First edition of Huygens\' most important work, containing the first mathematical analysis of the motion of the pendulum, and a general treatise on the dynamics of bodies in motion.); Photo 穢 Christie\'s Images.