Steam locomotive No. 1 'Locomotion', Stockton & Darlington Railway
1825
Nobili's metallic tints (metallochrome)
pre-1919
Edison cut-out and bolt switch
One of Wheatstone's electromagnetic engines, 1841
1841
Frequency indicator vibrating reed meter
1907-1917
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
electrolytic gas engine
Giant glass lens made by Pilkington Special Glass Limited, 1989
1989