Horologiographia
Horologiographia is a 1533 Basel treatise on sundial construction by Sebastian Münster, a cosmographer, with woodcut illustrations attributed to Hans Holbein, printed for scholars and instrument makers. The pictures are plain black-line geometric diagrams of dials, meridian lines, horizon circles and gnomons, with lettered reference points and occasional small sun or wind figures in the corners that a designer could take as a clean, precise system of construction lines and radiating rays.
