Elements of geometry
Elements of geometry is a 1807 geometry textbook by George Walker, a British mathematician, held by the Smithsonian Libraries and aimed at students learning Euclidean proof. Its pictures are hand-drawn, pen-and-ink diagrams of circles, chords, tangents and triangles, labelled with letters at each point, showing construction steps laid out on ruled plates. A designer might draw on their sparse linework, lettered construction marks and grid-like page layouts for technical or geometric motifs.
