Traité de géometrie descriptive, ligne droite et plan, polyèdres, surfaces. Texte et dessins
A French descriptive geometry textbook by Jules Pillet, published in Paris by C. Delagrave in 1887 for students of engineering and technical drawing. Its pictures are precise line diagrams of projections, planes, cones and intersecting solids, drawn in fine black lines on cream paper with dashed construction lines and lettered points; a designer might borrow their clean technical linework, dotted auxiliary guides and grid-like layouts for minimalist graphics.
