Gnomonica fundamentalis et mechanica : Worinnen gewiesen wird, wie man so wohl gründlich als auf Mechanischer Art Allerhand Sonnen-Uhren regulaire, irregulaire ... verfertigen solle; Worzu noch eine neue Invention einer Universal-Sonnen-Uhr kommt...
Gnomonica fundamentalis et mechanica is a 1733 German treatise on sundial construction by Johann Friedrich Penther, published by Wolff and held by the Eisenbibliothek Schlatt, written for craftsmen and instrument makers. Its engraved plates show sundials of many shapes, including octagonal, regular and irregular dials, with hour lines radiating from gnomons, alongside drafting instruments and measuring tools that a designer could draw on for geometric, radiating line patterns.
