Wooden model to illustrate the causes of eclipses, 1867.

Cupping set, in wooden case, 1860-1930.

Cupping set, in wooden case, 1860-1930.

Optical toy employing multiplying lens, c 1880.

Construction of the Rotherhithe Tunnel, London, 1907.

Netsuke showing a man applying moxa, Japanese, late 18th century.

12-ton coal wagon, 1912. Model (scale 1:8).

Maurice Farman, French aviator, 1910.

Maurice Farman, French aviator, 1910.

Henry Farman, French aviator, 1910.

Dotting machine, English, 1918-1926.

Monaural stethoscope, c 1840s.