DESCRIPTION
Antique woodcut, showing a schematic view of a petroleum-fired magic lantern (sciopticon) or image projector. Illustration from a book in Physics from 1883. V: lamp; e: flame; B: petroleum reservoir; F: chimney; i and i': glass plates; G: hinged door with a concave mirror; o and o,: condensing lenses; P: spring clamp (holds the transparent picture); a and b: achromatic lenses. Related images: