La pratique du trait a preuues de Mr. Desargues lyonnois, pour la coupe des pierres en l'architecture
A 1643 Paris treatise by the engraver Abraham Bosse setting out Gérard Desargues's geometric method for stonecutting and sundial layout, printed for masons, architects and students of projection. The etched plates are line diagrams of semicircles, radiating sightlines, dotted construction arcs and serif capitals marking points, usable as technical linework, circular grids and diagram ornament.
