{??} Photograph (Lantern Slide, Panorama Format, for Use in Wood-Framed Slide): Star Maps, c.1920

Possibly a slipping Slide, see inv. no. 65686.Two oblong pieces of glass are held together with blue tape at the top and bottom. Another strip of tape runs down one side of the slides. The glass plates have painted diagrams of the North and South Polar Maps, the Zenith Line of Greenwich and star constellations.