Manière universelle de Mr. Girard Desargues, pour pratiquer la perspective par petit-pied, comme le geometral : ensemble les places et proportions des fortes & foibles touches, teintes ou couleurs
A 1648 French treatise on perspective by Gérard Desargues, with engravings by Abraham Bosse, printed in Paris for artists and draughtsmen learning to construct perspective by the small-foot method. The pictures are geometric diagrams of vanishing points, orthogonals, and horizon lines drawn over ruled grids, with lettered points and measuring scales. A designer could take from them the clean logic of one-point and two-point construction and the precise, line-only vocabulary of early engraved technical drawing.
