Ars magna lvcis et vmbrae, in decem libros digesta. Qvibvs admirandae lvcis et vmbrae in mundo, atque adeò vniuersa natura, vires effectusq, vti noua, ita varia nouorum reconditiorumq, speciminum exhibitione, ad varios mortalium vsus, panduntur
Athanasius Kircher's 1646 Ars magna lucis et umbrae, a Roman treatise on light and shadow printed by Hermann Scheus for scholars and natural philosophers. Its pages show geometric diagrams of sundials, circles with intersecting lines and lettered points, and a polar dial with curved hour lines, all drawn in fine black line on cream paper, offering a designer clear models for technical linework, radiating grids and astronomical diagrams.
