Janus-Epidiaskop. Eine Quelle der Unterhaltung
A 1910 German trade catalogue from Ed. Liesegang of Düsseldorf promoting the Janus epidiaskop projector to teachers, clergy, lecturers and clubs. Loose pen sketches, printed on tinted stock with a thin rule border, show seated audiences from behind as a projector throws butterflies, comic drawings and lecture diagrams onto a screen; useful for figure-group silhouettes, light-beam cones and captioned figure layouts.
