Instrument for measuring the intensity of vibration in the air, early 20th century.

Regnault's measuring cylinder and specific gravity bottle, 19th century.

The Robot Dentist, 1 May 1936.

Scientists at the National Physical Laboratory, Teddington, May 1932.

Victor Meyer's vapour density apparatus, 1878.

Sikes hydrometer, 1870-1930.

Sikes hydrometer, 1870-1930.

Dial from Shelton's sidereal clock, 1768-9.

Shelton regulator clock, 1768-1769.

Clock movement from Shelton regulator clock, 1768-1769.

Dial from Shelton regulator clock, 1768-1769.

Clock movement from Shelton regulator clock, 1768-1769.