William Murdock, Scottish engineer and inventor of coal-gas lighting, c 1800.

Carbon filament lamp, 1890-1920.

"Man pouring molten metal, c 1920s."

Plaster model of Fresnel Wave Surface in three parts, by Delagrave, 1876.

`Tabloid' metal medicine chest in metal case, by Burroughs Wellcome and Co, one of two used by the 1933 Land Expedition to Mount Everest. View of whole object with chest closed, shot on black background.

Ordinary safety Bunsen burner with gauze ca

Ceramic light switch, c 1900.

Ceramic light switch, c 1900.

White metal tin-based bearing alloy. 9% ant

A 'bonnetted' Clanny lamp, no 19, c 1882.

Two Clanny safety lamps, 1869-1874, and 'bonnetted' Clanny lamp, c 1882.

Two 'bonneted' clanny lamps and two clanny lamps, c 1880s.