Triunial magic lantern with three lenses, 1890.

Achromatic stereoscope, 1865-1875.

Achromatic stereoscope, 1865-1875.

Achromatic stereoscope, 1865-1875.

Achromatic stereoscope, 1865-1875.

Magic lantern made by J H Steward, late 19th century.

Magic lantern, late 19th century.

Lenses from a Devon lighthouse, Science Museum, London, 1987.

C Goodwin Norton, lantern entertainer, late 19th century.

Ives stereoscopic Kromscop viewer, c 1890.

Sir David Brewster, Scottish physicist, 1834.

Sir David Brewster, Scottish physicist, c 1860s.