De radiis visvs et lvcis in vitris perspectivis et iride tractatus
This is a 1611 Venetian treatise on optics, vision and the rainbow by Marco Antonio de Dominis, written in Latin for scholars of natural philosophy. Its pictures are geometric diagrams of light rays drawn in fine black line with lettered points, over a faint printed text block behind them. A designer might take from them the clean, schematic logic of ray lines converging on a point, useful for minimal line work or technical motifs.
