Traite pratique de photographie au charbon
A French photography manual by D. van Monckhoven, published in Paris by G. Masson in 1886, written for practitioners of carbon printing. Its pictures are plain line engravings of equipment: a shallow hinged printing frame, a lettered wooden box with a curved door, a tray of sensitized sheets, and a schematic apparatus diagram. A designer might take from them the clean, labelled, technical look of 19th-century instructional drawings, with hatched shading and lettered reference points.
