Philosophiae quarta pars De Physica, manuscript treatise on the laws of Physics, in Latin, drawing on Aristotle, Ptolemy and other sources, with nine text diagrams in pen-and-ink relating to optics, astronomy, the density of water, weights and magnetic fields, including images showing the mechanics of a fountain, syringe and catapult, [France, 18th century], approximately 632 pages, 8vo (lacking end, ink corrosion affecting one diagram, occasional browning). French 18th-century calf, spine tooled in gilt (worn).