Monographie du stéréoscope et des épreuves stéréoscopiques
A nineteenth-century French monograph on the stereoscope and stereoscopic photographs, written by Henri de La Blanchère and published in Paris by Amyot in 1861 for photographers and optical enthusiasts. Its pictures are plain line diagrams of optical paths, prisms, lenses and eye positions, showing how two offset images fuse into one, which a designer could borrow for schematic depth or dual-perspective graphics.
