OPTICS. 'Optica', possibly authorial manuscript in an informal Italian hand, with some emendations, [17th century]. Title, preface and text in two parts, respectively comprising 13 and 10 propositions, 30 full-page diagrams (numbered 1-32, lacking no. 14, nos 27-28 on a single page), depicting the eye and the ways in which images of objects are projected onto it. In Latin, 97 pages, 210 x 150mm. Contemporary speckled calf, title in gilt on spine (the binding rather worn, more so to the spine).