Anfangsgründe der Arithmetick, Geometrie und der geometrischen Berechnungen
An 18th-century German mathematics textbook on arithmetic and geometry by Johann Wilhelm and Johann Andreas von Segner, published in Halle in 1764 for students learning elementary calculation. Its plates are numbered engraved diagrams of triangles, circles, polygons and inscribed figures labelled with letters, showing construction and proof steps. A designer could take the clean, rigid geometric linework and the dense grid layout of small labelled figures as a model for technical diagrams.
