Trepanning set, English, c 1750s.

Three sets of chemical apparatus, 1801.

Telephonic set of instruments (Edison's system), c 1880s.

Production of Armstrong gun bars, Elswick, Tyne and Wear, 1862.

Set of mathematical instruments, c 1701.

Turret mechanism from English tent type camera obscura, c 1850s.

'Harvest Home', c 1810-1820.

Series of photographs of the Sun, London, 1876.

Drawing instruments, 1723.

Plan and section of surveying instrument, 1799.

'Geological map of the world', c 1850.

'Geological map of the world', 1850.