Les agrandissements
A French photography manual by Étienne Wallon, published in Paris by Gauthier-Villars in 1899 and associated with the Conservatoire national des arts et métiers, aimed at photographers and technical students learning enlargement. The pictures are plain line diagrams of optical ray paths through lenses, a condenser, a projection setup with a mirror, and a small Greek-lettered emblem with a laurel wreath, offering a designer clean schematic linework and a classical crest motif.
