Varia opera mathematica
A 1679 Latin mathematics volume printed at Toulouse by Johann Pech, collecting the works of Pierre de Fermat edited by his son Samuel, with a reconstruction of Apollonius's lost treatise De locis planis. The pages are set in dense roman type with geometric diagrams in plain line work, labelled with capital letters and built from straight lines, circles and arcs. A designer could take from them the clean, schematic logic of early scientific figures, where lettered points and simple construction lines carry the meaning.
