NATURAL PHILOSOPHY. ‘Physice Generalis ... Physice Particularis’, manuscript treatise, [?Italy, 18th century]. The first 278 pages covering natural philosophy, including the Cartesian, Newtonian and Peripatetic schools of thought, and including one diagram of Descartes’ plenum vortices copied from his Principia philosophiae; the second part of the text, ‘Physice Particularis’ (pp. 279-446), a treatise on the properties and behaviour of water, including diagrams, some with watercolour. In Latin, 446 pages, 215 x 160mm, (apparently incomplete: a few pages excised). Contemporary vellum.