Catalogue général des appareils & accessoires usités en projection : avec notices et renseignements concernant leur construction, usage et mode d'emploi
A Paris trade catalogue of 1901 from Radiguet & Massiot, successors to Molteni, listing lantern-projection apparatus and accessories with notes on their construction and use. The pictures are plain engraved diagrams and product views: a lens-and-condenser optical layout, a lamp housing on stands, a boxed lantern with a glowing egg-shaped lamp, and a metal adjustable mount on rods. A designer might take their precise line work, dark-field framing and tidy mechanical forms as a model for technical diagrams.
