Discours de la methode : pour bien conduire sa raison, & chercher la verité dans les sciences : Plus La dioptrique, et Les meteores. Qui sont des essais de cete methode
A 1658 Paris printing by Henry Le Gras of Descartes's Discours de la methode with La dioptrique and Les meteores, a French-language scientific and philosophical treatise for learned readers. The woodcuts are optical diagrams: parallel ray bundles striking stippled spheres and lenses, lettered construction points, rainbow and refraction figures useful as line-and-dot geometry, arrow motifs, and schematic eye and light studies.
