Steam locomotive No. 1 'Locomotion', Stockton & Darlington Railway

1825

Edison cut-out and bolt switch

Nobili's metallic tints (metallochrome)

pre-1919

instrument to measure maximum demand and record during a period

Motor starting switch resistances in sand box

Electro-motor invented by P.H. Desvignes in 1843

1843

Map case, British, 1921-1940

1921-1940

Frequency indicator vibrating reed meter

1907-1917

One of Wheatstone's electromagnetic engines, 1841

1841

electrolytic gas engine

Giant glass lens made by Pilkington Special Glass Limited, 1989

1989