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10314059
Fleming's original thermionic valves, 1889.
10474672
Electrical interrupter, c.1900.
10474673
Induction-compensator, c.1900.
10474674
Induction compensator, c.1900.
10474675
Induction compensator, c.1900.
10474676
Induction compensator, c.1900.
10474679
Diagram for stroboscopic speed regulation, c.1885.
10474680
Diagram for stroboscopic speed regulation, c.1885.
10436436
‘Electrical Apparatus No 2’, 1804.
10324891
Large plasma ball, c 1990s.
10325971
Hauksbee's frictional electricity machine, 1706-1708.
10436435
‘Electrical Apparatus No 1’, 1804.
10325782
Quartz crystal in valve. Quartz crystals ar
10309217
Crookes tube, c 1888.
10422595
‘Electricity’, 1850.
10326343
Diode valve, early 20th century.
10431938
Electrical experiment, 1933.
10326050
Wheatstone's original dynamo, c 18th centur
10326049
Apparatus employed by Sir Charles Wheatston
10326014
Wheatstone's experimental magneto, c mid 18
10324627
Original Parsons three-phase turbo-alternat
10324628
Original Parsons three-phase turbo-alternat
10324629
Original Parsons three-phase turbo-alternat
10324630
Original Parsons three-phase turbo-alternat
10190599
Aurora tubes and flasks, c late 18th or ear
10190585
Electrical chimes, c 1769. Made by George A
10193134
Armstrong's hydro-electric machine, 1845.
10324719
Thomson's cathode ray tube, 1897.
10262650
Crookes Maltese cross tube (left) and radiometer (right), 1879-1888.
10262212
Cylinder machine, 19th century.
10193043
Crookes' tube showing the phosphorescence of rubies, 1879-1888.
10419162
Glowing Geissler tubes, 1858.
10193032
Crookes' mill-wheel tube, 1879-1888.
10324054
Crookes radiometer, 1879-1888.
10309218
Working Geissler tube, c 1988.
10317635
Soft 'round' receiving valve, c 1916.
10312437
Fleming diode, British, 1905.
10311227
Davy's potash experiment, c 1808.
10211951
A million volt impulse generator in action
10309220
Working Geissler tube, c 1988.
10309219
Working Geissler tube, c 1988.
10214905
Crookes' 'shadow' tube, 1914.
10193716
Faraday's electrolysis globe, 1834. 1931
10193247
Faraday's electrolysis tube, 1833. 1931
10190615
Globe electrical machine, c 1765. Designed
10309222
Working Geissler tube, c 1988.
10314091
Crookes tube, c 1888.
10211953
A million volt impulse generator in action
10312438
Fleming diode, British, 1905.
10311226
William Crookes' famous 1887 Maltese cross experiment, c 1990s.
10208047
Electrolytic gas engine by Talbot and Wheat
10207544
Wheatstone's magneto electric machine, 1860
10207989
Original Parsons three-phase turbo-alternat
10208305
A million volt impulse generator in action.
10456151
Electric egg between two discharge tubes.
10207658
The first direct reading moving needle amme
10314118
Demonstrating a giant induction coil, 1877.
10207995
Page's electric motor produced in 1851.
10207651
Weston's direct reading ammeter, no.21478.
10308396
Fleming's original thermionic valves, 1889.
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